you guys are WRONG
"it is what is" has two ways
you ask questions and the person says it is what it is................thats fine, i agree with you
but if you ask questions and the person gives a bullshit response?
then you can say, i guess it is what it is...it means the same thing you guys are saying
but im allowed to say it is what it is, mockingly in that scenario
quite a few of you deserve, "i guess it is what it is"