I encountered two uses of the word 'spurious' which I am not sure I understand:
1. A Surious vs. a sound argument (the context is logic and rhetoric).
2. An ancient work that was treated by historians as spurious (fake?) and was attributed by some to a different writer.
In both cases (especially in the first) I get the general idea, but I would be glad to receive a clear explnation of the meaning in each.
You are right. "spurious" means "not based upon facts, fake, false, insincere