Historical clue formulations

• See 105-Across — 2026-06-07
• "That wasn't just talk on my part" — 2021-01-02
• "That wasn't an empty threat!" — 2011-07-25
• Affirmation of seriousness — 2010-12-11
• "My comment was serious" — 2010-07-31
• "That wasn't a joke!" — 2008-09-20
• "That was no joke" — 2005-09-24