But .txt is not the same as .rs; yet .txt is not the same as .docx, although both of these files look the same to the human eye.
But .txt is not the same as .rs; yet .txt is not the same as .docx, although both of these files look the same to the human eye.
Nope. Wrong. There are thousands of file types, and while a handful of them fall somehow under your four categories, most of them actually don’t.
And calling .docx a “text file” is an insult to all honest text files.