Fair, although I was more referring to fully separate tasks, one could argue a one man band is still broadly doing things in sync and broadly the same mental task.

It is a valid point that it could be learned with enough practice and dedication, but I think going above two would be exponentially harder.

Unfortunately the limitations there are probably in the brain not the limb. For example, can you competentely do two things at once with each of your hands?

Now that sounds like it’s leaning into anti-semetic Nazi bullshit. Would you say that all Jews should be killed?

And for the record I’m not in the slightest pro-israel