Imitator:

The problem here is, once again, there is no fact that we exist, there is no fact that we are "thinking". All of us could very well be figments of your imagination, in which case, it isn't a fact that he exists, and its not a fact that he is thinking.
If you don't know you exist, how can you know anything else? I believe you're in denial. You use your mind to recognize yourself and say it's not for sure, and then you use your mind to come to some other conclusion that you believe is correct. How can recognizing any possibility come before recognizing your mind which recognizes?? It cannot. You can't and you're in denial. But I 've addressed this several times.

We could all be a part of some great beings dream, in which case its not a fact that we exist, and its not a fact that we are truly thinking.
What evidence to you have to show that may be possible? You don't have any. How do you know what is possible or not? What we know as possible is dictated by what we observe in the outside world. Don't call your imagination a fact.

Its very very very very very very very likely that we do exist, but its not a fact.
How do you know it's very likely that we exist if it supposedly can't be verified? How do you determine value? How do you know it's more likely without taking into equation the empirical evidence. So it's really only part empirical evidence, and part imagination.

The only reason that the whole mental excercise of "Cognito ergo sum" exists, is because he took the liberty of excusing the possibility of him being a part of the Dreamers theory. He specifically stated that to assume that would mean that anything is possible, and he was going to assume that it was not possible, to allow for him to continue.
Don't compare me with Descartes. I'm arguing, not him. And he's flawed in that logic and I don't agree with it.

A better, more modern example of something similar to the dreamers theory, is the movie "The Matrix". In that movie, they live in a world which is not real, living lives that are not real, and feeling and doing things which were not real. Something similar could be happening, and we would not know unless someone outside of that system was able to inform us. Otherwise, we would be oblivious.
Once again you contradict yourself. How do you know that the matrix is a possibility? You use your mind and the outside world which you say cannot be validated to help conclude (the other part being your total imagination) something you believe is validated. That is, the possibility for such and such. It's not valid. So you use your mind to build a conclusion and you deny your mind. Go with the evidence you do have. You can never deny your mind.

There's a good chance you just did it. that is, used your "unverifiable" mind to try to think of a "verifiable" refutation. You cannot escape your mind. You cannot escape reality.