Lyman, I seem to recall that the pilot declared, and it was recorded on the CVR, "alternate law" at a time close to when he took controls.
Eleven seconds (a very long time!) after PF declared, "I have the controls,"
PNF said, “we’ve lost the speeds then,” then, ”alternate law protections." (From Interim Report No 3, Page 10.)
There is no indication that this was ever heard or responded to, as far as I can tell.
Begin speculation: Even if PF did know they were in ALT 2 (not in evidence), I'd bet dollars to doughnuts that he was not intimately familiar with the flight laws pertaining to ALT 2.