Is solipsism falsifiable?
According to one argument, no experiment (by a given solipsist A) can be designed to disprove solipsism (to the satisfaction of that solipsist A). Solipsism is therefore said to be unfalsifiable in the sense in which Karl Popper used the word. A solipsistic viewpoint held by a particular individual is unfalsifiable only to that individual, however. Any other person B might by introspection (cogito, ergo sum) conclude that he or she (B) does in fact exist and therefore that A is proven wrong (though B might symmetrically doubt whether A exists, and therefore would not have disproven solipsism per se, only solipsism by A). Even though B has proven A wrong, there is no way for B to validly convince A to abandon solipsism, since A doubts B’s very existence, let alone B’s experiences or experimental results.
