John McWhorter PhD Linguistics (Stanford). The Power of Babel (2003). pp. 226-227.
I don't know how to replicate the format on the para. on p. 227 on Old English.
I didn't spot the red underline overhead before, but I now agree with McWhorter that it feels illogical to say "what one didn't see was anything", to express nothing as anything or something, or "that one saw nothing".
But why have this illogical weirdness persisted? Why have humans acclimated to this illogical syntax, rather than a more logical alternative?
