What tells a pianist which hand to use?

[lettersquash]

I will not engage with troll behaviour. 

If I am behaving as a troll, then you are engaging with troll behaviour. Since I'm not, you're fine and no paradox has ensued. And I'm pretty sure you know this isn't trolling. Or you need to read the Urban Dictionary. You pissed me off. I sniped. Trolling is something different.

The questions you have been asking in this thread require a certain amount of technical information in the response to do it justice.  You take issue with explanations that were designed as a big picture overview of the many moving components, as being vague generalizations.  Yet, at the same time you throw a tantrum when presented with concepts that involve a certain amount of technical detail.  Your reactions make it difficult to understand what it is you are seeking. 

Nope. I don't take issue with big-picture explanations, I find it unhelpful when those are the response to a specific question. I have explained this above at least once. You may find it difficult to understand what it is I am seeking; that is not due to my reactions, it is due to your inability to follow the clear argument. We can eliminate vast numbers of differences in playing circumstances - we can eliminate virtually ALL differences in playing circumstances! In this way, we can discover the specific effect of one, or the interplay of two, like staccato alone, or staccato with a sustain pedal. If this is beyond you, that's not my fault. My anger was elicited by your patronizing, lecturing response to my simple conversation about this. You go on as if you can not ever possibly be wrong about anything at all, so any questioning of your analysis must be by a complete idiot who needs to be given yet another lecture. That's what I take issue with.

Take a break.  Return when you have cooled your head.

You just can't stop lecturing, can you? I'll write what I want, when I want.

[quantum]

[...]
You just can't stop lecturing, can you? I'll write what I want, when I want.

No troll food for you.

[lettersquash]

No troll food for you.

I've just put you on ignore, so I won't see you telling me repeatedly how you're not talking to me, while you fail to respond to the conversational content (I wonder if there's a word for that).