Maybe you have the wrong teacher. Try learning from Beavis and Butthead.
Learn Logic with Beavis and Butthead!
A work in progress, where our two friends exemplify logical fallacies, types of causation and other cool stuff. Quotations are from memory, and so may not be entirely accurate, e.g. I may have substituted "buttmunch" for "buttknocker"....
This is where you include the concept you are defining in the definition of that concept.
Butthead: Shut up, bunghole!
Beavis : What's a bunghole?
Butthead: A bunghole is what you are, bunghole!
Fallacy of Accident
Assuming that a generalisation will hold in every case.
Butthead: They must be cool, they're from Seattle.
Converse Fallacy of Accident(?)
Making a generalisation from insufficient evidence.
Storekeeper: Hello, Maximart. We've got a robbery in progress
Police : Are they armed?
Storekeeper: Er...of course they're armed. Aren't all kids armed?
Equivocation means many things, but is often taken to mean using a word in a different sense to that which was intended. In fact the word "equivocation" is pretty equivocal.
(Beavis, under the influence of a music video, is "dancing" on the sofa.)
Butthead: Get down, Beavis!
Beavis : I am getting down!
A chicken and egg situation. Not always the result of faulty logic, of course - life is often like that, as Butthead demonstrates here....
Beavis : How come Tom Petty's on TV?
Butthead: Coz he's famous, dumbass.
Beavis : Yeah, but how come he's famous?
Butthead: Coz he's on TV, buttmunch!
Beavis : Yeah, but how come he's on TV?
and so on....
Beavis on the philosophy of language