We’re always using perception, of course, but we can learn about inaccuracies in one perception using a different perception (and reason). A very obvious exampl

We’re always using perception, of course, but we can learn about inaccuracies in one perception using a different perception (and reason). A very obvious example is optical illusions, but this is in fact the case with all observations. To make scientific conclusions from observations made using a telescope, you need to know how the telescope works. And the same is true of all observations from all instruments, including for example the human visual system.