Monk/Bladesinger can you add the INT to the Unarmoured Defense?

@clare_hugillhi I had questions of you dont mind.if you have a monk bladesingin wizard can you and the int to the Unarmoured defence of monk believe no – either use bladesinger AC or monk AC #WOTCstaff

— (((Mike Mearls))) (@mikemearls) December 10, 2016