I'm very intrigued by this as well. I tried a variety of shapes and the only ones it recognized for me were "S shaped" and "very straight." I did get these too

I'm very intrigued by this as well. I tried a variety of shapes and the only ones it recognized for me were "S shaped" and "very straight." I did get these too though: "Your guess was extremely accurate. Is that you, Raj Chetty?" "We’re going to be honest here: Your line was pretty odd. Did you even try?"