It’s probably because the “create a Reddit post” form doesn’t require you to even visit the subreddit you are posting to. It DOES show you the rules/sidebar of the subreddit you are about to post to (for /r/rust it includes a link to /r/playrust for the gamers) but apparently many aren’t seeing that.

It is hard to perceive that which you are not aware exists even with obvious evidence in your face

You are an average person. A program you're using crashes.

The only non-generic word you see in the crash message is "SQLite".

You look it up, find SQLite, and you bother the developers for help.

The problem is as old as labels.

Likely a case where Google figured out which one you meant through the telemetry of what you clicked on and how you refined your search, now that personalization is automatic. In my case, I get four regular results, which are the financial standard, the programming language, the wikipedia page for the programming language, and an ISP; then I get a "top stories" block that is all about the singer.

More tricky for the sibling comment with Rust, where either one could be valid.