Baggett and Walls on faith and reason

This seems right to me...

What merely exceeds our reason may be hard to understand, like the Trinity, but it's still perfectly rational to believe in it; what fundamentally violates our reason or nonnegotiable moral intuitions, in contrast, is beyond the pale and so irrational to believe. [Good God (OUP, 2011), 77]

The key question in fleshing out this distinction concerns what one considers his or her nonnegotiable moral intuitions.