[raghavtoshniwal]

Recognizing to disregard input from your wrist/palm when it's resting on the iPad surface whilst one is using Apple Pencil.

[ganzuul]

...Psychosomatic cognitive dissonance?

I don't own or use Apple products so this takes more explaining for me.

[fastball]

You're typing on your laptop and you don't want your wrist/palm to accidentally trigger anything on your trackpad, so you employ wrist rejection.