What is real?

What is real?
Are we here, or probably we are not? Is this essay an essay or is just part of my imagination? How will I know what is real and what is not? I asked to some people and their answers were, “Real is everything that you can touch”, “Real is everything that you can see”, or “Real is everything that you can fell”. In order to not contradict I didn’t argue their answers. However, when I was alone I thought. If real is everything that you can touch, the spaces is not real. Also, If real is everything that you can see, in the dark nothing is real. The last one was my favorite, if real is everything that you can feel, then the people who are more emotional, are more real that the people who are less emotional?
In The Matrix, the movie, according with Morpheus this world is not real. We live on a computer program, and our brains are the one witch put us limits. In other words, what is real, is what you think is real, and what is not real is what you think is not real. This perception of the reality was really useful for Neon at the end of the movie; Neon didn’t die because he didn’t believe that he was dead. If that is trust then just for think that my credit card’s bills are not real, will they disappear? Lets me try, these bills are not real, these bills are not real, these bills are not real, not sorry they are still real. When people doesn’t know how to understand or explain something the best answer is always the simples one. For example, in math if you don’t understand something you say that it is part of the infinity. Now what is the infinity, where is it localized, and how can you work with it? Looks like people do the same with the mind that they do with the infinity. When the philosophers try to understand what is real, they just answer it is in the mind. However, they didn’t understand what the mind is or where it is.
Looks like sometimes, the best theory is the one that can not be falsify. If you don’t believe me, you can related to the theory of denial by Sigmund Freud. Now, if real is in the mind, what is real for me should not be the same for you. Also, what make a book “A book”? When I born the book was a book already, and after my dead, it will continue been a book. Then, what make things what they are? Are there a unit-mind? Is there a whole mind that makes things what they are? The people, who are on mental institutions and have medical condition, probably see the reality more than the people who are not inside one of these centers.
Some philosophers that asked the same question like Plato or Aristotle had different answers. For Plato, real or ideas exist on separate reality. They are eternal then a tree is not real because it dies. For Aristotle, ideas exist on the physical object. At the end look like what is real or not just depend on what kind of drug you use. To illustrate, what kind of leaf you smoke. If you smoke a good one, your reality will be different as if you smoke a cheap one. I really don’t know what kind did Plato or Aristotle smoked. However, what I will do one day is visit Holland and ask to a guy on a Smoke-coffee what is real? Probably his answer will be better that mine because I just really don’t have an answer for what is real or what are I certain of.