To make a truly viscous gravy the proportions are about two cups of liquid to three tablespoons of flour. I mention this because of what I will from now on be referring to as "Age Related Forgetfulness." It is a phrase that is both polite and forgiving in same way that "Midriff Bulge" is both polite and forgiving.
"Age Related Forgetfulness" is not a term I have come to embrace without
considerable thought. "Can't Remember Crap," for example is very depressing, as
well as defeatist. And wandering through an index unable to remember
whether F comes before H is just very, very sad.