smatterer

Don't spare study; if you will be a lawyer, become a good one, not a smatterer.

At this explanation she shook her head, and observed that no smatterer could read as I had done.

Like Mr. Stevenson's smatterer, who was asked, "What would be the result of putting a pound of potassium in a pot of porter?"

Any mere sciolist, any empiric, any smatterer of the new medical course—and where would Frank Gilham's arm be now?

He was a smatterer of that most dangerous kind, who feel certain they have arrived at truth.