... Solipsists declare
that no one else is there,
    yet go on writing -for others
... Behaviorists affirm
that thinkers do not learn,
    yet go on thinking -undismayed
... Subjetivist find
that it's all in the mind
    yet go on sitting -on real chairs
... Popperians deny
that we can't verify,
    yet go on searching -for the truth
... Existentialist declare
that they are in complete despair
    yet go on writing.