Just summarizing...
Inside/outside ski
Uphill/downhill ski
Left/right ski
Right/other right ski
Right/wrong ski
Mountain/valley ski
Right/left footer
Stance/free foot
Rider/decider ski
Big toe/little toe side
Smart/dumb ski
I think we need a thesaurus for ski terms.
How would you describe the entry in your thesaurus for those words?
(I completely rephrased that to be...less argumentative)
One doesn't need a dictionary for inside/outside. How inside/outside relates to a turn is a different matter and can be shown quite easily. If that doesn't make sense you try something else.
In the end, lots of terms might have to be used and even something odd might work for someone. Like "decider". That's what
@markojp is getting at.
In general, those who teach skiing have come to see inside/outside as much less confusing to people, and actually beneficial as it relates to the turn itself. Not the terrain.
Simple-
Left tip left to go left.
That only deals with the inside ski. The body will figure out the outside ski.
It's still not clear to me what the inside ski decides according to JF, or anyone else using this terminology.
The outside ski is the platform ski, okay I get that.
But what does the inside ski decide? Who can enlighten me?
Well not "terminology" but concept.
If you follow the somple phrase above, left tip left to go left, the inside ski determines where to go.
If you only focus on the ouside ski, you will end up a-framed and possibly worse, blocked by the inside ski. The most important thing is to clear the inside ski to allow one to move in that direction. Failire to do that will result in stems, steps, rotary push off, whole body rotary moves etc., to start the new turn.
Possibly we could argue this, but the most important thing in skiing is the release and commitment to the new turn. (Or commitment downhill) Those are also the two things most humans naturally do not want to do. As a result they develop all the techniques above to compensate because you have to do something to go downhill.
So, which ski is involved in release, outside or inside?
Well... technically at the moment, it's the outside ski. However, as soon as it's released, and the new turn starts, it's the inside ski. Since you're done with the old turn, we could just say it's the inside ski. Being more precise, it's the "new inside/old outside" ski. But that's complicated and possibly confusing. So we could just say "new inside" since what matters is what's ahead not what's past and done with. To make that simpler, we could just say "inside".
(Note how "left tip left to go left" bypasses all that terminolgy. Yes it's guiding the left tip to the left, but the phrase can also be used for tipping the left ski to the left as well)
The interesting thing, the more you tip the inside ski to the little toe side, the more edge angle you'll get on the outside ski.
One thing that can help with all this is thinking of "a turn" from fall line to fall line. That way the transition is in the middle and is actually part of a turn. The other way, where turns are kind of C's welded together almost ignores the most important part- the transition.