Shouldn't you believe you see everything you see?
If you want to then make wild inferences like 'there is an imperceptible separate "matter" or "object" which "causes" these sights on past and future occasions and which continues to exist between them unobserved, and every sight has a corresponding "matter" or "object"', well, that's not Ironcroft's problem.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.