Some of you are hiding behind semantics just to make your moot points.
I think you know exactly what I'm saying and you're arguing just to argue.
Exactly. I know Bobbsy meant well with that last post, but it's arguing semantics again. We're talking about recording here, and in a recording world, your "source" isn't the guitar itself (at least in this scenario). The SOURCE of the actual SOUND you're trying to capture is the cabinets, which is, as Greg said, outputting something different on the "left" and "right" cabinets, so it's considered stereo.
Look, we're talking about stereo sources as it relates to recording audio. The current standard for records and albums and singles (ie, music) released is two speakers. Stereo.
I mean, if you wanted to be nuts, if you're mixing in 5.1, you can have more than a "stereo" or "mono" source, but with the current state of things, you have things that could potentially benefit more by stereo micing (as I mentioned in my previous anechoic chamber example) that DOESN'T rely on processing, and you've got things like vocals that are really only viably reproduced in mono, save for if you've got a great room to record in and want to record it the way Michael Jackson did as someone mentioned in a previous comment.
This doesn't have to be as complicated as everyone is making it. I'm acknowledging that in the real world, there's no such thing as a "stereo source." Only sources that could benefit from stereo micing. That's essentially what defines a stereo source here is that it's able to be recorded in stereo because it's going to provide something more in stereo. That's it.
I know Miro took a jab awhile back comparing what we're saying now to what MusicWater was doing awhile ago with his garbage speak of audio, but the primary difference is right now, you should be able to agree we're using words that actually relate to audio to explain our jargon here. There are a ton of words that exist in audio that have no REAL definition, but we use them anyway (usually relating to how something sounds, eg, bright, dull).
Edit:
For shits, I looked up the definition of stereo:
ster·e·o
ˈsterē-ō,ˈsti(ə)r-/
noun
noun: stereo
1.
sound that is directed through two or more speakers so that it seems to surround the listener and to come from more than one source; stereophonic sound.
And to further explain myself, that's the point we're trying to make. In order for it to be stereo, it has to come from more than one source (as we've called them, a "point source.") in order to be stereo. Things like a singer will never ever ever be stereo, unless you're relying on spatial cues such as reverb or the person running across the room while recording to do that.
There are instruments that can do this, they are stereo sources.
And there are instruments that can not. Those are mono or "point" sources.