I promise you - You say this when you're too lazy to fix your mistakes and h

You say this when you're too lazy to fix your mistakes and hope the person will just forget about it.

'I promise you, I didn't cheat on the test!' said the kid who had a cheat sheet in his pocket.

'I promise you, I didn't forget your birthday!' said the kid who had no idea it was happening.

'I promise you, I didn't eat the whole cake!' said the kid who was already licking the bowl.