When someone has said something incredibly hypocritical, you might respond, "That's rich." This helps you express how disgusted you are about the hypocrisy.
What's a formal alternative to rich used in this way?
Example of how I would like to use the word:
It is __________ (adj) [or, it is the height of _________ (noun)] for the school to claim that such-and-so change to the student's 504 plan was made based on the parents' input. In fact, the parents had strenuously objected to the change for the following reasons: ....
But hypocrisy isn't strong enough.