DQN example: target DQN == behavior DQN (bug? or by design?)

Hi!

Did you make these 2 the same on purpose? Following the "Algorithm 1" from the original arxiv 2013 paper?

They initially stated that we should freeze the DQN and use it as the target net (because of stability), but later in "Algorithm 1" they (probably by mistake) used the same theta params for both nets.

I think it's a bug. You can get more information from this issue.