I know yea! - You say this when someone says something and you know it's t

You say this when someone says something and you know it's total nonsense.

'You think the teacher will let us out early?' 'I know yea! She’s still grading our tests!'

'He said he’d stop being loud.' 'I know yea! He just screamed in the hallway!'

'She said she’d stop eating pizza.' 'I know yea! She just ordered another slice!'