Guys, read the human performance group report, it's in the public docket on the NTSB website. The FO commuted in on FedEx; the pilots and another commuter on the SEA-MEM leg said she slept, and she told the CA of the MEM-EWR leg that she slept. She was then observed sleeping in the crew room throughout the day (her showtime was 1330 but their first roundtrip was cancelled so both her and the CA hung out in the crew room all day). Now, none of that is very good rest - but from the report it's clear that there was more than enough time to get good rest if they'd had a place to do so. Neither had a crashpad.