Jk Rowling's pen.
Einstein didn't suggest an alternative to Quantum Mechanics, or deny it. He just didn't like it!
I thought it was more Tapeworm, maggots and fleas ... I was sure they thought sheep came from Ewes, though they did think that the Ram was mainly responsible, with the Ewe being hardly more than the flower pot. The ancients had some interesting contraceptives too, some of which do work, other such as worn charm obviously were not rigorously tested. In the end the Catholic Church decided any woman providing working contraceptive remedies was "obviously" a witch and this resulted in one of the first edicts about witches.