OK, this is the real report. It is very clear that PF was confused from the start and disbelieved airspeed. PNF kept telling him to descend, at one point saying "all three say you are climbing so descend";.
At one point PNF says ";we still have engines so whats happening"; presumably referring to the low airspeed.
2:12:27 PNF You're climbing (Stall warning), Descend descend descend descend
PF I was descending then?
PNF, Descend
Captain: No, you're climbing
PF: There I am climbing, ok now descend
The focus herein should be why the PF & PNF got so confused, although I am wondering how the PNF and Captain could not notice the PF's input. They realised they were climbing and knew they shouldn't be.