It has been >30 years (and it wasn't Philosophy 101), but this is the essence of what I remember as one of my favorite passages of Thomas Hobbes' Leviathan. The idea that without agreed upon premises/assumptions/definitions and the application of reason, all you get is nonsense, which he names "opinion".
I probably missed the nuance, but I think the following still stands: Reasoning from scientific facts or accepted dogma is irrefutable. Having no solid foundation or failing to use reason gets you nothing better than opinion, which is neither faith nor fact.
Happy to learn where my misunderstanding lies though.