How do the idea of mirror neurons change the legitimacy of solipsism as an absolute basis of epistemology?
Also, Jungian typology introduces the notion of a probably biological modality for individual knowledge. In my mind there are typical types of cognition that organize the ego's mastery of libido in the greater psychic environment. These are the four functions and the ego, of necessity, develops a preferential bias towards some functions over others.
The bias does not necessarily mean that our "inferior" function is stupid, just under utilized for important ego choices and responses. If the ego connects with the inferior functions it makes erratic conscious choices because the function is not tied in well with the overall adaptivity of the individual's ego-consciousness to the greater psychic background. This is just like the right-handed person trying to use their left hand instead. Still that inferior function (left hand) may make clever and insightful differentiations and know true from false only be inexplicably unable to effect the satisfying results that the superior functions (right-hand) can produce.
For example, an intuitive can be a skilled craftsman or a thinking type may have a well-developed emotional intelligence. But the intuitive's intuition and the thinker's thinking will take the lead when the instincts demand satisfaction and there is pressure to succeed against a backdrop of less than complete confidence about a response to the demands of the environment. So the intuitive craftsman may become frustrated with an escalating need to accomplish, in his or her craft, more and more "divine" outcomes. A thinker may find themselves confused as their more and more concisely logical analyses cause more and more the alienation of others.
Also, I would argue that solipsism is already undercut by the fact of consciousness being a function of language and culture which together are the particular, coordinating forms to which individual consciousness' align and take for granted in order to make any kind of communication and understanding between individuals and even within one's self possible.
