Well, an example to drive home the OP's point. Try this on for size:
The Ontological Argument (kind courtesy of St. Anselm 🥀💀)
- If God does not exist then God is not the greatest being imaginable.
- God is the greatest being imaginable
Ergo,
- God exists (1, 2 Modus Tollens)
The great Bertrand Russell is supposed to have declared the ontological argument as sound. Another luminary, Kurt Gödel, thought it was the best theists had to offer? Why else would he refine it and perfect it?
Something's not quite right, I know it, but I don't know what exactly!!!
P. S. We should call it Saint Anselm Syndrome.