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  1. tenex

    How does nonsense like this survive?

    Actually, what's most disturbing is that they're not complete rubbish; each has (or had) a kernel of truth that makes them sound somewhat plausible. Prisms do invert, the path through SP prisms is more convoluted, and so on. This means we're dealing not with simple ignorance, but actual...
  2. tenex

    How does nonsense like this survive?

    Wild guess re: quote #1: the only Porro bin they ever tried was a 7x with IF. As to the others: such stupidity only has to happen once, after which it merely requires ignorant copying, today perhaps even by AI. Caveat lector.
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