Solipsism is the philosophical idea that only one's own mind is sure to exist. The term comes from Latin solus (alone) and ipse (self).http://en.wikipedia.org/wiki/Solipsism" [Broken]. Here is my argument against solipsism, which I apply only to our known universe. I don't exclude the possible existence of solipsistic universes entirely. 1) If I am the only mind in a closed space (universe), it is highly plausible that I would be capable of manipulating this closed space (my experiences) the way I want. 2) If I am not the only mind in a closed space (universe), it is highly plausible that the interactions between my mind and the other minds will result in certain constraints (universe laws for example), which I won't be able to manipulate alone. From 1) and 2) follows that the existence of only one mind in this universe is highly implausible. I want to hear your thoughts on this argument (how valid it sounds to you) and the solipsistic doctrine (could the external world and other creatures be merely representations). Also we can extend the thread and discuss the idealistic philosophy as a whole (do you think experiences are necessarily private; could matter represent the interactions between the minds; do you believe that our universe has absolute existence or it will be "gone" the second no mind occupies it).