Dude, it's 2024. Just tell him to strap on his jetpack and zip down there.
But seriously, this is an extremely interesting post about a nice thing you did for your friend and it's very cool that you've posted it here.
I'd say it's "scientific" enough given that any "results" are purely subjective. Perhaps more "social" experiment than "scientific". It addresses an idea I've seen here a few times and happen to agree with - that it's very difficult to say with certainty what bass is on a recording when it's sitting appropriately in the mix. Even with the ability to solo the bass track, it can still be a shot in the dark. I would hesitate to go as far as calling it impossible though. I've worked with a couple people who have had some pretty amazing "golden ears". I mean, no one who could ID the brand of 9V in their wah-wah pedal, but...
It's even tougher if you actually fully mix each track.
Picking your favorite is one thing, but it might actually be kinda interesting if everybody tried to figure out what names were what kind of bass. Given a list of possibilities it probably wouldn't be too hard with soloed tracks, in the mix would definitely be more difficult.
) and practically buried in the mix.