I may be misunderstanding this. But the halting problem ∈ RE-complete. P ⊂ RE EXP ⊂ RE. therefore EXP^RE = P^RE = RE(my logic might be(is probably)) wrong here, please edit it if it is to be right) Hopefully you get the idea.. Isn't the time hierarchy theorem supposed to hold relative to every oracle, but here it seems as if every single complexity class collapses into whatever class O(1) is. I'm probably wrong here in some context. I'm very new to this so if you down-vote please explain why. Thanks.