My question #2 was about the "other" IDs, meaning not the ones that were listed as "acceptable". We all hear anecdotal stories where a Costco ID was accepted. My question is whether there's some SOP or unofficial procedure that would allow that or if it's entirely up to the discretion of the TDC. (The specific "unacceptable" IDs that I showed were a CLEAR card, an expired work ID with picture, a current ID (with picture) from a residence, a Social Security card, and a few credit cards/FF cards.)

Also, there are other reasons why the identity verification process might fail. For example, for a person who is in the 18-20 range, there may simply be no data on that person in the databases used. Another is that the data may be wrong (e.g., in my case, addresses that are really second homes are often the "right answer" to security questions on credit reporting web sites that ask for "previous address"). Or the answer might be something the passenger has to look up: another favorite question is the amount of a mortgage payment, but that's something I never remember and have to look up. The STSO I spoke to in TPA said outright that if something like that happened or I "make a mistake", I wouldn't be allowed to fly. It sounds like you disagree.