right, but for a square, you have to add 8 samples, not 2, to handle the 4 starting points and 2 directions, but this does not account for the users who multi-stroke

> Different strokes...

I see what you did there :] I'm definitely in the reduce user burden camp.

https://quickdraw.withgoogle.com/ is a good baseline to start from for a more resilient gesture recognizer