his model for contrastive divergent learning pre 2000 iirc was what really set the base for his breakthrough in the mid 2000. I think it took him sometime to ma

his model for contrastive divergent learning pre 2000 iirc was what really set the base for his breakthrough in the mid 2000. I think it took him sometime to make the jump from contrastive divergence learning to RBMs that learnt good priors for deeper layers...