"Don't care" - it has a value, but it doesn't matter. This is classically used in Karnaugh maps. But you can imagine two kinds of "don't care" values, too: the

"Don't care" - it has a value, but it doesn't matter. This is classically used in Karnaugh maps. But you can imagine two kinds of "don't care" values, too: the complacent one, and the assertive one. The complacent one is the one we have in Karnaugh maps, which says, "it doesn't matter what I am, so if it matters to you what I am, I'll be what you want". But the assertive variant says, "I don't matter, and if I matter for your calculation, your calculation clearly doesn't matter either."