> Sitting in a chair is either a) not an act of faith or b) the word faith itself designates nothing at all.
It's the old "God of the gaps" argument. "Faith" here means ignorance. The reason we don't know the chair won't collapse is because we didn't pay attention in science class, or we don't know how structural integrity works, or we don't know the properties of certain materials, or whatever.
By contrast, there are few concepts more "heretical" (in the literal/etymological sense of the word) than "sola scriptura," i.e., to "become a church unto oneself."
It is precisely this implicitly heretical "sola scriptura" preoccupation (and with it, such anxiety to prove the veracity of the physical texts themselves!) that contradicts the very concept of orthodoxy.
Sitting in a chair is either a) not an act of faith or b) the word faith itself designates nothing at all.