A dog is not the opposite of a cat

The opposite of a cat is the absence of a cat ☝️

How do you know you’re not allergic? Have you ever rubbed one over your most delicate parts?

...when i was in second grade i wrote a book report on chocolate fever, in which the climax involved the protagonist taking vanilla pills, which were so obviously the opposite of chocolate to my eight-year-old perspective, but which no adults with whom i discussed the book found at all obvious...

I seem to remember a youtube video from years ago explaining how things can be opposites in different ways, like glue is the opposite of scissors because of the use, red is the opposite of blue because of what they represent, etc.

The opposite of cat is "inside-out cat".

Humans (like most living things) like to put things in boxes to make navigating their environment simpler. Temperatures aren't really opposites because they're on a continuum, but we talk about hot and cold as opposites to bring order to environmental navigation. The same with presence and absence of light and bright/dark. So, extending this logic, the opposite of cat is the absence of cat, but that doesn't really make sense. If you cut a cat in half, are you halfway on a continuum from cat to the opposite of cat? If the cat is whole but has died, is it cat, opposite of cat, something else entirely? I have no idea, and no one else really does either. Brains are weird.

uʍop dark-cat

cat is for concatenating files, so the opposite would be something that breaks a stream up into multiple files.

pwd Print Working Directory

So the desired response is, "What is "what is up dog?"?"?

I'd say mouse as there are many manic cat mouse duos like Itchy and Scratchy

The opposite of a cat is dark energy.

Up

Should be an inside out cat, with its insides on the outside and emptiness inside