I can't click a button I see flash faster than 200 ms, and that's when 100% of my attention is looking closely at a light change color and clicking. If 20ms is

I can't click a button I see flash faster than 200 ms, and that's when 100% of my attention is looking closely at a light change color and clicking. If 20ms is an issue for a conversation, where there so much more processing and understanding from both side, I'm clearly a subhuman...