The four things my 6YO has to tell you about windows and blinds

Marking this completely unprompted bit of deductive reasoning from my 6YO down for posterity:

Daddy. It’s true that some windows have blinds and need them, and other windows have blinds and don’t need them. Other windows don’t have blinds and do need them, and other windows don’t have blinds and don’t need them. Those are the four things I have to tell you about windows and blinds.