These days I’ve got three languages rattling around in my head: English, Croatian, and American Sign Language (ASL). (There was a point at the start of college when I could read novels in Spanish, but that muscle has since atrophied.) Where I am and who I’m with dictates which language is in the driver’s seat, of course, but they’re always in there, vying for control.
The conventional answer to this question is that three blades minimizes the shadow effect that each leading blade has on the blade that follows. You want more blades to reduce the starting torque required to get your turbine spinning (this is analogous to having more cylinders in an engine making it run smoother) but if you have too many blades the shadow effect hurts efficiency and drops the total yield. Three blades peak at about 48 percent efficient, which isn’t 59.3 percent but is near enough and happens to be the practical output I mentioned two paragraphs ago. So it must be right, right?
Computers live in virtual space; dance is visceral. But the truth is that the biggest problem with choreography and AI is something that choreographers themselves have been struggling with for as long as the art has been around: notation.