Sometimes is it worth to rethink the problem. Especially when your condition is based on set-members. Using quantor logic often simplifies the condition :

return 
    any(x for x in X if x==condition_a) 
    or all(y for y in Y if y==condition_b) 
    and all(x for x in X if x==condition_c)

I am not sure if JS has something similar, but this often helps by a lot