To add a bit of color (ha) I was with my color-sighted spouse at a spot well known for panoramic views. 50ish people there. Many conversations happening around me.

“I can’t see anything” “Maybe that’s something over there?” “What’s everyone looking at?”

Someone shows their phone.

“Ooh!” “How do you turn on night mode?” “Wow it’s so much clearer on the phone!”

So I can’t know what their eyes see or what they really think, I could hear what came out of their mouths.

I don’t think this is an instance that warrants deep philosophical skepticism about the nature of truth or the impossibility of knowledge.