How does one deal with the charge of solipsism?
Solipsism is the extreme idealist view that there is no world beyond our mind. Constructivists must be unwavering agnostics with regard to existence because, like Berkeley, they cannot conceive of what that word should mean outside the domain of experience. Whatever may lie beyond experience is inaccessible to human reason. But this is no denial of ontological reality; nor does it deny that artists and mystics may intuitively participate in an ulterior reality. Constructivism merely holds that such a reality cannot be known rationally. The construction of our experiential reality is never ad lib, but subject to constraints – and in many cases we are unable to decide whether the constraints we meet are due to inconsistencies in our construction or constitute impediments of the unknowable.