[recursive]

That sounds like a very useful skill for a working player. But it seems to come with a couple of significant conditions.

I can believe this is possible. But I don't think this is a reasonable thing as a baseline expectation for a player with 6 weeks of experience, which was the original comment in this thread.

I don't know the details, but I imagine you're feeling beats transmitted through the neck or something. But if that is the case (an assumption) it still requires you to have at least one known-good string, unless you're playing solo.

So, for these circumstances, and others, a pedal-based or clip-on headstock tuner seem like they still have plenty of practical application.

[deadfoxygrandpa]

depends on the instrument. with acoustic instruments the resonance chamber is often tuned so that you can feel the body itself vibrating more when you're in tune

[recursive]

I don't doubt that this is true at some level. But is it really perceptible for 20cent differences? I don't know anything about this, but I'd be surprised. I'd say +/- 20 cents is a bare minimum for calling something "tuned", but low single digits is really the goal.

[deadfoxygrandpa]

no, i still use an electronic tuner with my acoustic guitar. but i can feel the body vibrating differently when i get close to being in tune vs being a semitone off

[recursive]

Semitone precision is not good enough to replace a tuner. I believed that's what we were talking about. Still cool and interesting though.