For more information, see the Wikipedia
Solipsism is the philosophical position that the only justified belief is that one's own mind exists. Anything external lacks absolute certainty and is thusly uncertain and untrustworthy.
- Lacking absolute certainty does not inhibit one from making consistently good decisions. Therefore, Solipsism is a position that can be rejected as meaningless.
- If, in fact, one was to believe one was the sole entity in reality, one runs the risk of making decisions that could possibly injur oneself and/or others.