How do I check if a boolean is False??

I see the Is Boolean check but where is the !Boolean check?

Right-click the condition and choose Invert.

im just curious how come there isnt a check if boolean with drop down true,false. I know it seem crazy to have two of the same thing but wouldnt it make events more clear.

I'm using boolean variables in an expression. Can I invert them? example, in a settext of a dialog:

What I want:

DOG.chews & !FAM.chews?"...":"..."

My hack:

DOG.chews & DOG.chews <> fam.chews?"dog chews and fam doesn't":"dog not chews, or dog chews and fam does too"