Okay, my bad.

> it's about almost any string being a valid Perl program

Is this true? I think most random unquoted strings aren't valid Perl programs either, am I wrong?

Yes. That was the whole point of the original comment you were misunderstanding.

Because of the flexibility of Perl and heavy amount of symbol usage, you can in fact run most random combinations of strings and they’ll be valid Perl.

Copying from the original comment: https://www.mcmillen.dev/sigbovik/