> "I mean, who can you believe if you can't believe him?" Well since we have a recording, I think that believing our own ears is a reasonable option. I think

> "I mean, who can you believe if you can't believe him?" Well since we have a recording, I think that believing our own ears is a reasonable option. I think that most of us have misspoken in the past without realizing it. It's similar to botching a sentence on paper, but reading it back to yourself correctly while proofreading it. It happens. As such, I think it is more than possible that Armstrong meant to say "a", thought he said "a", but did not say "a".