In the book of Ester (6:1), Achashverosh can't sleep and asks to bring the book of records to him. Rashi says that the reason why is in case he was done a favor by someone and didn't repay it and that person was plotting against him or ignoring a plot against him. It turns out that he forgot to repay Mordechai's favor of saving the king's life, so he immediately sets out to repay it.
My question is why the king thought that Mordechai would be so bothered that his favor wasn't repayed, but he didn't think that Mordechai would be bothered by the fact that there was an outstanding decree to destroy every single Jew, Mordechai included.
His explanation is pshat.
That is a meaningless tautology.