I don't know what to write
You're lying and you're bad at it. Use this when you’re too dumb to come up with anything and you’re too proud to admit it.
I don't know what to write because I'm dumb and I'm too proud to say so.
I don't know what to write and I'm too dumb to fix it.
I don't know what to write and I think I’m the smartest person in the room.