Dilettante: a dabbler, an amateur who does not realize he is an amateur.
Typically, he is learned in one discipline and, in his self image, he illegitimately transfers prestige to another discipline. (So, the more expert you are in one field the more susceptible you are to being a dilettante in another. ) He knows enough to be dangerous. He sees others’ fields close but not from the inside, just close enough to see 100% of the form but only a fraction of the substance.
One mark of the dilettante is the confusion of form with substance.
The dilettante overvalues intent.