feat(learn,app): explanations wait behind a question mark beside their title

What explains a setting or a section, rather than what is the person's
own, moves behind halkyon_ui's HelpButton, beside its title through the
new ExplainedTitle (the developer's review of 3 Nov 2026): in Learn's
settings (citations, the Pomodoro timer, grammar, the web search,
Jellyfin, the device's dictionaries, counting one's learning), the study
settings, export's progress, the Jellyfin tags and the study button's
back first; in halkyon_app, setting up a password, adding SimpleLogin,
own keys not allowed, the profile page's link back and the operator's
grant sheet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/learn/halkyon_learn_flutter/lib/src/feature/assistant/widget/assistant_settings_card.dart

@@ -33,9 +33,10 @@ class const AssistantSettingsCard({super.key}) extends StatelessWidget {
           ),
           SwitchListTile(
             contentPadding: EdgeInsets.zero,
-            title: Text(l10n.settingsAskAssistant),
-            subtitle: Text(l10n.settingsAskAssistantSubtitle),
-            isThreeLine: true,
+            title: ExplainedTitle(
+              l10n.settingsAskAssistant,
+              help: l10n.settingsAskAssistantSubtitle,
+            ),
             value: on,
             onChanged: (on) => context.read<DeviceSettingsBloc>().add(
               DeviceSettingsEventAssistantChosen(on),

apps/learn/halkyon_learn_flutter/lib/src/feature/dictionary/widget/device_dictionary_widgets.dart

@@ -186,15 +186,14 @@ class const _SettingsCard() extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.stretch,
           children: [
-            Text(
+            ExplainedTitle(
               l10n.settingsDeviceDictionaryTitle,
+              help: l10n.settingsDeviceDictionaryAbout,
               style: theme.textTheme.titleSmall?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),
             ),
-            const SizedBox(height: 4),
-            Text(l10n.settingsDeviceDictionaryAbout),
-            const SizedBox(height: 12),
+            const SizedBox(height: 8),
             if (dictionaries.progress case final progress?)
               DeviceDictionaryProgressView(progress: progress)
             else if (installed != null)

apps/learn/halkyon_learn_flutter/lib/src/feature/export/widget/export_studyset.dart

@@ -256,8 +256,10 @@ class _ExportSheetState() extends State<_ExportSheet> {
               value: _withProgress,
               onChanged: (value) =>
                   setState(() => _withProgress = value ?? _withProgress),
-              title: Text(l10n.exportWithProgress),
-              subtitle: Text(l10n.exportWithProgressSubtitle),
+              title: ExplainedTitle(
+                l10n.exportWithProgress,
+                help: l10n.exportWithProgressSubtitle,
+              ),
               contentPadding: EdgeInsets.zero,
               controlAffinity: ListTileControlAffinity.leading,
             ),

apps/learn/halkyon_learn_flutter/lib/src/feature/jellyfin/widget/jellyfin_browser_screen.dart

@@ -159,15 +159,16 @@ class _JellyfinBrowserScreenState() extends State<JellyfinBrowserScreen> {
                       child: Column(
                         crossAxisAlignment: CrossAxisAlignment.stretch,
                         children: [
-                          Text(l10n.jellyfinSubtitle),
-                          const SizedBox(height: 4),
-                          Text(
-                            l10n.jellyfinPrivacy,
-                            style: theme.textTheme.bodySmall?.copyWith(
+                          ExplainedTitle(
+                            l10n.jellyfinTitle,
+                            help:
+                                '${l10n.jellyfinSubtitle}\n\n'
+                                '${l10n.jellyfinPrivacy}',
+                            style: theme.textTheme.titleSmall?.copyWith(
                               color: theme.colorScheme.onSurfaceVariant,
                             ),
                           ),
-                          const SizedBox(height: 12),
+                          const SizedBox(height: 8),
                           const JellyfinConnectForm(),
                         ],
                       ),

apps/learn/halkyon_learn_flutter/lib/src/feature/jellyfin/widget/jellyfin_settings_card.dart

@@ -14,22 +14,14 @@ class const JellyfinSettingsCard({super.key}) extends StatelessWidget {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          Text(
+          ExplainedTitle(
             l10n.jellyfinTitle,
+            help: '${l10n.jellyfinSubtitle}\n\n${l10n.jellyfinPrivacy}',
             style: theme.textTheme.titleSmall?.copyWith(
               color: theme.colorScheme.onSurfaceVariant,
             ),
           ),
-          const SizedBox(height: 4),
-          Text(l10n.jellyfinSubtitle),
-          const SizedBox(height: 4),
-          Text(
-            l10n.jellyfinPrivacy,
-            style: theme.textTheme.bodySmall?.copyWith(
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-          ),
-          const SizedBox(height: 12),
+          const SizedBox(height: 8),
           const JellyfinAccountView(),
         ],
       ),

apps/learn/halkyon_learn_flutter/lib/src/feature/settings/widget/citation_settings_card.dart

@@ -30,20 +30,14 @@ class const CitationSettingsCard({super.key}) extends StatelessWidget {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          Text(
+          ExplainedTitle(
             l10n.settingsCitations,
+            help: l10n.settingsCitationsDescription,
             style: theme.textTheme.titleSmall?.copyWith(
               color: theme.colorScheme.onSurfaceVariant,
             ),
           ),
-          const SizedBox(height: 4),
-          Text(
-            l10n.settingsCitationsDescription,
-            style: theme.textTheme.bodySmall?.copyWith(
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-          ),
-          const SizedBox(height: 12),
+          const SizedBox(height: 8),
           DropdownButtonFormField<CitationStyle>(
             initialValue: style,
             // A style's name is cut short rather than overflowing a phone.

apps/learn/halkyon_learn_flutter/lib/src/feature/settings/widget/settings_screen.dart

@@ -177,9 +177,10 @@ class const _PrivacyCard() extends StatelessWidget {
               ),
               SwitchListTile(
                 contentPadding: EdgeInsets.zero,
-                title: Text(l10n.settingsCountLearning),
-                subtitle: Text(l10n.settingsCountLearningSubtitle),
-                isThreeLine: true,
+                title: ExplainedTitle(
+                  l10n.settingsCountLearning,
+                  help: l10n.settingsCountLearningSubtitle,
+                ),
                 value: counted ?? false,
                 onChanged: counted == null
                     ? null
@@ -221,8 +222,10 @@ class const _StudyCard() extends StatelessWidget {
           ),
           SwitchListTile(
             contentPadding: EdgeInsets.zero,
-            title: Text(l10n.settingsStudyPomodoroTitle),
-            subtitle: Text(l10n.settingsStudyPomodoroSubtitle),
+            title: ExplainedTitle(
+              l10n.settingsStudyPomodoroTitle,
+              help: l10n.settingsStudyPomodoroSubtitle,
+            ),
             value: context.select<DeviceSettingsBloc, bool>(
               (bloc) => bloc.state.pomodoroWhileStudying,
             ),
@@ -270,9 +273,10 @@ class _WritingCardState() extends State<_WritingCard> {
           ),
           SwitchListTile(
             contentPadding: EdgeInsets.zero,
-            title: Text(l10n.settingsGrammarTitle),
-            subtitle: Text(l10n.settingsGrammarSubtitle),
-            isThreeLine: true,
+            title: ExplainedTitle(
+              l10n.settingsGrammarTitle,
+              help: l10n.settingsGrammarSubtitle,
+            ),
             value: context.select<DeviceSettingsBloc, bool>(
               (bloc) => bloc.state.checkGrammar,
             ),

apps/learn/halkyon_learn_flutter/lib/src/feature/study/widget/study_button_block.dart

@@ -346,8 +346,10 @@ class _StudyButtonDialogState() extends State<_StudyButtonDialog> {
                         ),
                         SwitchListTile(
                           contentPadding: EdgeInsets.zero,
-                          title: Text(l10n.studyButtonBackFirst),
-                          subtitle: Text(l10n.studyButtonBackFirstHelper),
+                          title: ExplainedTitle(
+                            l10n.studyButtonBackFirst,
+                            help: l10n.studyButtonBackFirstHelper,
+                          ),
                           value: _backFirst,
                           onChanged: (value) =>
                               setState(() => _backFirst = value),

apps/learn/halkyon_learn_flutter/lib/src/feature/study/widget/study_settings_sheet.dart

@@ -240,14 +240,16 @@ class const _Options({required final StudyOptions options})
                   value: mode,
                   contentPadding: EdgeInsets.zero,
                   dense: true,
-                  title: Text(switch (mode) {
-                    LearnMode.spaced => l10n.studyModeSpaced,
-                    LearnMode.cram => l10n.studyModeCram,
-                  }),
-                  subtitle: Text(switch (mode) {
-                    LearnMode.spaced => l10n.studyModeSpacedHint,
-                    LearnMode.cram => l10n.studyModeCramHint,
-                  }),
+                  title: switch (mode) {
+                    LearnMode.spaced => ExplainedTitle(
+                      l10n.studyModeSpaced,
+                      help: l10n.studyModeSpacedHint,
+                    ),
+                    LearnMode.cram => ExplainedTitle(
+                      l10n.studyModeCram,
+                      help: l10n.studyModeCramHint,
+                    ),
+                  },
                 ),
             ],
           ),
@@ -265,8 +267,12 @@ class const _Options({required final StudyOptions options})
           ),
           contentPadding: EdgeInsets.zero,
           dense: true,
-          title: Text(l10n.studySettingsQuizMc),
-          subtitle: Text(l10n.studySettingsQuizMcDescription),
+          title: ExplainedTitle(
+            l10n.studySettingsQuizMc,
+            help:
+                '${l10n.studySettingsQuizMcDescription}\n\n'
+                '${l10n.studySettingsAspectDescription}',
+          ),
         ),
         if (options.quizVocabulary) ...[
           const SizedBox(height: 8),
@@ -289,13 +295,6 @@ class const _Options({required final StudyOptions options})
                 ),
             ],
           ),
-          const SizedBox(height: 4),
-          Text(
-            l10n.studySettingsAspectDescription,
-            style: theme.textTheme.bodySmall?.copyWith(
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-          ),
         ],
         SwitchListTile(
           value: options.typeReadings,
@@ -307,8 +306,10 @@ class const _Options({required final StudyOptions options})
           ),
           contentPadding: EdgeInsets.zero,
           dense: true,
-          title: Text(l10n.studySettingsTypeReading),
-          subtitle: Text(l10n.studySettingsTypeReadingDescription),
+          title: ExplainedTitle(
+            l10n.studySettingsTypeReading,
+            help: l10n.studySettingsTypeReadingDescription,
+          ),
         ),
         const SizedBox(height: 20),
         Text(l10n.studySettingsCharacters, style: heading),
@@ -318,8 +319,10 @@ class const _Options({required final StudyOptions options})
           onChanged: (write) => change(options.copyWith(writeByHand: write)),
           contentPadding: EdgeInsets.zero,
           dense: true,
-          title: Text(l10n.studySettingsWriteByHand),
-          subtitle: Text(l10n.studySettingsWriteByHandDescription),
+          title: ExplainedTitle(
+            l10n.studySettingsWriteByHand,
+            help: l10n.studySettingsWriteByHandDescription,
+          ),
         ),
       ],
     );

apps/learn/halkyon_learn_flutter/lib/src/feature/tag/widget/manage_tags_sheet.dart

@@ -106,8 +106,10 @@ class const _HideJellyfinTags() extends StatelessWidget {
     final l10n = AppLocalizations.of(context);
     return SwitchListTile(
       contentPadding: EdgeInsets.zero,
-      title: Text(l10n.tagManageHideJellyfin),
-      subtitle: Text(l10n.tagManageHideJellyfinHint),
+      title: ExplainedTitle(
+        l10n.tagManageHideJellyfin,
+        help: l10n.tagManageHideJellyfinHint,
+      ),
       value: context.watch<JellyfinTagsBloc>().state ?? false,
       onChanged: (hidden) => context.read<JellyfinTagsBloc>().add(
         JellyfinTagsEventHidingChosen(hidden),

apps/learn/halkyon_learn_flutter/test/feature/profile/public_profile_test.dart

@@ -419,6 +419,14 @@ void main() {
 
       expect(copied, 'https://halkyon.eu/@raisondetredev');
       expect(find.text('Address copied.'), findsOneWidget);
+
+      // What linking back does, behind its question mark (decided 3 Nov
+      // 2026).
+      final checkmark = find.textContaining('gets a checkmark');
+      expect(checkmark, findsNothing);
+      await tester.tap(find.byTooltip("What's this?").last);
+      await tester.pumpAndSettle();
+      expect(checkmark, findsOneWidget);
     });
 
     testWidgets('a link saved is checked by itself, and gets a checkmark once '

apps/learn/halkyon_learn_flutter/test/feature/settings/widget/settings_screen_test.dart

@@ -206,6 +206,38 @@ void main() {
     expect(brightnessAt(tester, find.text('Appearance')), Brightness.light);
   });
 
+  testWidgets("every setting's explanation waits behind the question mark "
+      "beside its title, its values in view (the developer's review of 3 Nov "
+      '2026)', (tester) async {
+    await pumpApp(tester, testDependencies(), location: RoutePaths.settings);
+    for (final (title, explanation) in [
+      ('Citations', 'How sources and studysets'),
+      ('Show the Pomodoro timer while studying', 'Show the focus / break'),
+      ('Check grammar while writing', 'Underline possible spelling'),
+      ('Search the web from the app', 'Off unless you turn it on.'),
+      ('Jellyfin', 'Watch shows and films'),
+      ('Count my learning in Explore', 'Explore shows how many people'),
+    ]) {
+      final titled = find.widgetWithText(ExplainedTitle, title);
+      await tester.scrollUntilVisible(
+        titled,
+        200,
+        scrollable: find.byType(Scrollable).first,
+      );
+      await tester.pumpAndSettle();
+      expect(find.textContaining(explanation), findsNothing, reason: title);
+
+      await tester.tap(
+        find.descendant(of: titled, matching: find.byType(HelpButton)),
+      );
+      await tester.pumpAndSettle();
+      expect(find.textContaining(explanation), findsOneWidget, reason: title);
+      await tester.tap(find.text('OK'));
+      await tester.pumpAndSettle();
+    }
+    expect(find.text('APA (7th edition)'), findsOneWidget, reason: 'a value');
+  });
+
   testWidgets('the citation style chosen shows on a sample at once and is '
       'kept', (tester) async {
     final store = MemoryDeviceSettingsStore();

packages/halkyon_app/lib/src/assistant/widget/assistant_grants_screen.dart

@@ -455,7 +455,11 @@ class _GrantSheetState() extends State<_GrantSheet> {
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
           if (grantee == null) ...[
-            Text(l10n.assistantPeopleTitle, style: heading),
+            ExplainedTitle(
+              l10n.assistantPeopleTitle,
+              help: l10n.assistantGrantNote,
+              style: heading,
+            ),
             const SizedBox(height: 8),
             if (state.accounts.isNotEmpty) ...[
               Wrap(
@@ -505,7 +509,14 @@ class _GrantSheetState() extends State<_GrantSheet> {
             ),
           ],
           const SizedBox(height: 16),
-          Text(l10n.assistantGrantBudget, style: heading),
+          ExplainedTitle(
+            l10n.assistantGrantBudget,
+            help: [
+              l10n.assistantGrantLimitHelper,
+              if (priced) l10n.assistantGrantMoneyNote,
+            ].join(' '),
+            style: heading,
+          ),
           const SizedBox(height: 8),
           if (priced)
             _LimitRow(
@@ -520,13 +531,6 @@ class _GrantSheetState() extends State<_GrantSheet> {
             suffix: null,
             enabled: !state.busy,
           ),
-          Text(
-            [
-              l10n.assistantGrantLimitHelper,
-              if (priced) l10n.assistantGrantMoneyNote,
-            ].join(' '),
-            style: muted,
-          ),
           if (grantee == null && state.replaced.isNotEmpty) ...[
             const SizedBox(height: 16),
             _Replaced(state.replaced, currency: setUp.currency),
@@ -538,10 +542,6 @@ class _GrantSheetState() extends State<_GrantSheet> {
               style: TextStyle(color: theme.colorScheme.error),
             ),
           ],
-          if (grantee == null) ...[
-            const SizedBox(height: 16),
-            Text(l10n.assistantGrantNote, style: muted),
-          ],
         ],
       ),
       footer: FilledButton(

packages/halkyon_app/lib/src/assistant/widget/assistants_card.dart

@@ -72,7 +72,7 @@ class const _AssistantsView({
           return const SizedBox.shrink();
         }
         final offer = state.offer;
-        final muted = theme.textTheme.bodyMedium?.copyWith(
+        final subtitle = theme.textTheme.titleSmall?.copyWith(
           color: theme.colorScheme.onSurfaceVariant,
         );
         return Padding(
@@ -141,19 +141,14 @@ class const _AssistantsView({
                 if (ownKept && (offer.ownKeys || state.own.isNotEmpty)) ...[
                   Padding(
                     padding: const EdgeInsets.only(top: 8),
-                    child: Text(
+                    // Why own keys go unasked, where they are not allowed,
+                    // behind its question mark (decided 3 Nov 2026).
+                    child: offer.ownKeys
+                        ? Text(l10n.assistantOwnTitle, style: subtitle)
+                        : ExplainedTitle(
                             l10n.assistantOwnTitle,
-                      style: theme.textTheme.titleSmall?.copyWith(
-                        color: theme.colorScheme.onSurfaceVariant,
-                      ),
-                    ),
-                  ),
-                  if (!offer.ownKeys)
-                    Padding(
-                      padding: const EdgeInsets.symmetric(vertical: 8),
-                      child: Text(
-                        l10n.assistantOwnNotAllowed(instance),
-                        style: muted,
+                            help: l10n.assistantOwnNotAllowed(instance),
+                            style: subtitle,
                           ),
                   ),
                   for (final own in state.own)

packages/halkyon_app/lib/src/password/widget/account_security_section.dart

@@ -79,8 +79,10 @@ class const _AccountSecurity() extends StatelessWidget {
             ListTile(
               contentPadding: EdgeInsets.zero,
               leading: const Icon(LucideIcons.keyRound),
-              title: Text(l10n.passwordSectionSetUp),
-              subtitle: Text(l10n.passwordSectionSetUpHint),
+              title: ExplainedTitle(
+                l10n.passwordSectionSetUp,
+                help: l10n.passwordSectionSetUpHint,
+              ),
               onTap: () => _setUp(context, security),
             ),
         ] else if (!security.finished)

packages/halkyon_app/lib/src/profile/widget/public_profile_section.dart

@@ -731,9 +731,6 @@ class const _ProfilePage({required final String url}) extends StatelessWidget {
   Widget build(BuildContext context) {
     final l10n = HalkyonAppLocalizations.of(context);
     final theme = Theme.of(context);
-    final muted = theme.textTheme.bodySmall?.copyWith(
-      color: theme.colorScheme.onSurfaceVariant,
-    );
     return Padding(
       padding: const EdgeInsets.only(top: 8),
       child: Column(
@@ -751,6 +748,9 @@ class const _ProfilePage({required final String url}) extends StatelessWidget {
                   overflow: TextOverflow.ellipsis,
                 ),
               ),
+              // What linking back does, behind its question mark (decided
+              // 3 Nov 2026).
+              HelpButton(l10n.publicProfileVerifyHint),
               IconButton(
                 tooltip: l10n.publicProfilePageCopy,
                 icon: const Icon(LucideIcons.copy, size: 18),
@@ -766,7 +766,6 @@ class const _ProfilePage({required final String url}) extends StatelessWidget {
               ),
             ],
           ),
-          Text(l10n.publicProfileVerifyHint, style: muted),
         ],
       ),
     );

packages/halkyon_app/lib/src/simplelogin/widget/simplelogin_section.dart

@@ -7,6 +7,7 @@ import 'package:halkyon_app/src/simplelogin/model/simplelogin_standing.dart';
 import 'package:halkyon_app/src/simplelogin/widget/keys_reset.dart';
 import 'package:halkyon_app/src/simplelogin/widget/simplelogin_sheet.dart';
 import 'package:halkyon_app/src/simplelogin/widget/simplelogin_standing_scope.dart';
+import 'package:halkyon_ui/halkyon_ui.dart';
 import 'package:lucide_icons_flutter/lucide_icons.dart';
 import 'package:material_ui/material_ui.dart';
 
@@ -64,8 +65,10 @@ class const _SimpleLoginSection({required final double gapAbove})
             ListTile(
               contentPadding: EdgeInsets.zero,
               leading: const Icon(LucideIcons.link),
-              title: Text(l10n.simpleLoginAddTitle),
-              subtitle: Text(l10n.simpleLoginAddHint),
+              title: ExplainedTitle(
+                l10n.simpleLoginAddTitle,
+                help: l10n.simpleLoginAddHint,
+              ),
               onTap: () => addSimpleLogin(context),
             ),
           ],

packages/halkyon_app/test/assistant/widget/assistant_grants_screen_test.dart

@@ -144,6 +144,37 @@ void main() {
     await show(tester);
     await tap(tester, find.text('Grant assistants'));
     expect(tester.widget<FilledButton>(saveButton()).onPressed, isNull);
+    // What a grant does and how its budget counts, behind the question
+    // marks beside People and Budget (decided 3 Nov 2026).
+    final note = find.textContaining('They agree once');
+    final counts = find.textContaining('Empty for none.');
+    expect(note, findsNothing);
+    expect(counts, findsNothing);
+    await tap(
+      tester,
+      find.descendant(
+        of: find.widgetWithText(ExplainedTitle, 'People'),
+        matching: find.byType(HelpButton),
+      ),
+    );
+    expect(note, findsOneWidget);
+    await tap(tester, find.text('OK'));
+    await tester.ensureVisible(
+      find.widgetWithText(ExplainedTitle, 'Budget, for all of them together'),
+    );
+    await tester.pumpAndSettle();
+    await tap(
+      tester,
+      find.descendant(
+        of: find.widgetWithText(
+          ExplainedTitle,
+          'Budget, for all of them together',
+        ),
+        matching: find.byType(HelpButton),
+      ),
+    );
+    expect(counts, findsOneWidget);
+    await tap(tester, find.text('OK'));
 
     await addPerson(tester, 'anna');
     await addPerson(tester, 'ben');

packages/halkyon_app/test/assistant/widget/assistants_card_test.dart

@@ -406,14 +406,16 @@ void main() {
       ),
     );
     await show(tester);
-
-    expect(
-      find.text(
+    const why =
         "Whoever runs test.example.org doesn't allow own keys here, so the "
-        "app doesn't ask these.",
-      ),
-      findsOneWidget,
-    );
+        "app doesn't ask these.";
+
+    expect(find.text(why), findsNothing, reason: 'behind its question mark');
+    await tester.tap(find.byType(HelpButton));
+    await tester.pumpAndSettle();
+    expect(find.text(why), findsOneWidget);
+    await tester.tap(find.text('OK'));
+    await tester.pumpAndSettle();
     expect(find.text('Add an assistant with your own key'), findsNothing);
   });
 

packages/halkyon_app/test/password/widget/password_sheets_test.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:halkyon_app/halkyon_app.dart';
 import 'package:halkyon_app/testing.dart';
+import 'package:halkyon_ui/halkyon_ui.dart';
 import 'package:material_ui/material_ui.dart';
 
 /// A signed-in person's app as a test makes one: whose it is.
@@ -592,6 +593,20 @@ void main() {
 
       expect(find.text('Set up a password'), findsOneWidget);
       expect(find.text('Change password'), findsNothing);
+
+      // What it is, behind its question mark (decided 3 Nov 2026).
+      const what =
+          'Sign in with your email address, a password and an '
+          'authenticator app.';
+      expect(find.text(what), findsNothing);
+      await tester.tap(
+        find.descendant(
+          of: find.widgetWithText(ExplainedTitle, 'Set up a password'),
+          matching: find.byType(HelpButton),
+        ),
+      );
+      await tester.pumpAndSettle();
+      expect(find.text(what), findsOneWidget);
     });
 
     testWidgets('offers none to one without an address: a code mailed to '