Because you are apparently incapable of reading or understanding my previous posts piecemeal, here are all relevant arguments. Despite your whining, my position is reasoned and far from arbitrary. You repeatedly failed to address these arguments, instead you constantly whine.
Solipsism is self-defeating, and in case you cannot understand it from my previous posts, let me walk you through it nice and slow.
Your mind constitutes of qualia, memories and thought processes, let's call it the "inner world". Solipsism holds that only these things exist. But we all also take a few basic assumptions, that outside reality exists, it is governed by causality, progression of time, determinism, and that our qualia and memories of past qualia are reflection of that reality. These assumptions provide a framework for interpreting the qualia etc. We take those assumptions not arbitrary, but out of necessity. We have simply no other way. Logic is one of basic consequences of these assumptions. Solipsism means ignoring these basic assumptions. But without them, how can you think, how can you exist? You have no point of reference and no logic, as you are denying that from which logic originates.