But actually, you can see an intense enough source of (monochromatic) near-UV light, our lenses only filter out the majority of it.
And if you did, your brain would hallucinate it as purplish-blueish white. Because that's the closest color to those inputs based on your what your neural network (brain) was trained on. It's encountering something uncommon, so it guesses and present it as fact.
From this, we can determine either that you (and indeed all humans) are not actually intelligent, or alternatively, intelligence and cognition are complicated and you can't conclude its absence from the first time someone behaves in a way you're not trained to expect from your experience of intelligence.
