Hi Ken Thompson! You are now subscribed to CAT FACTS! Did you know your cat does not concatenate cats, files, or time — it merely reveals them, like a Zen koan with STDOUT?

You replied STOP. cat interpreted this as input and echoed it back.

You replied ^D. cat received EOF, nodded politely, exited cleanly, and freed the terminal.

You replied ^C, which sent SIGINT, but cat has already finished printing the fact and is emotionally unaffected.

You replied ^Z. cat is now stopped, but not gone. It is waiting.

You tried kill -9 cat. The signal was delivered. Another cat appeared.