BOAC, I "think" what I meant was that a ND input would still come out NU and an NU input would also be an NU input. Whether they reversed as gums has said can happen, I don't know. I don't THINK the charts showed a full reversal even to the level that ND was more NU than an NU input. All I remember is that it looked like both resulted in NU type motion.
And I think
rudderrat hit the nail on the head for why the PF pulled nose up even though he was above FL100. The big (well trained) print buried in the FCOM called for TOGA and NU. (If it really is presented as quoted or as I remember seeing it in the past with smaller print for the above FL100 part it was presented poorly. It should break right at the beginning for above FL100 and below FL100 so the decision is made early and then procedure can be followed logically and linearly. (And thank you thank you for that post rudderrat.)