If you make a claim, be prepared to explain and defend it. It's not just courtesy to but also validates the time spent making the claim in the first place. Refusing to back up what you say wastes everyone's time, including yours, and reduces the board to a tis/tisn't level.

Saying you 'won't bite' when you instigated the discussion is peculiar indeed. It may well appear to a reasonable third party that you don't actually have any sound explanation.