Path of War Defense conundrum?

Path of War has Strike, Boost, Counter, and Stance.

Strike – usually an attack and extra damage and some effects

Boost – extra damage usually

Counter – repost, dodge, reaction

Stance – at will mods to certain aspects of combat

So my friend and I got in to a bit of a debate. Some Strikes and Boost can catch a target Flat-Footed. But if said target has a Counter,…can they counter the Strike/Boost while Flat-Footed? Specially if they don’t have Uncanny Dodge?