Oh, you used a ruler? How do you know the ruler is accurately measuring 3 inches? And furthermore, how do you know your eyes and brain can be trusted to read the ruler correctly to assess the height of the would-be FPS? For that matter, how do you even know what an inch is, and why was 3 inches the true height of an FPS anyway?
Heck, what does it even mean to “know” that something is “true”?
“Who is Descartes? Myth of the given? What are you talking about? I just want to define sandwiches.”
“Who is Descartes? Myth of the given? What are you talking about? I just want to define sandwiches.”