Official Book Change

[The R]

The book was not checked in this scenario.

But let's say it was. And let's also assume you checked it a few minutes before the game began.

Joe B (adult at the table) claims it was still changed before the start of the game and that he just forgot to tell the visiting team or you.

Your basis for the T will then be that the number was changed after you checked the book? Even though you have no knowledge if that occured before or after the start of the game?