You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
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Question: Category: FORWARDS & BACK WORDS 
Clue: Shrek & "therefore" (follows "cogito")

Answer: ogre & ergo


Question: Category: EDUCATION 
Clue: In 1836 he became president of Cincinnati College & published his 1st "Eclectic Reader"

Answer: william mcguffey


Question: Category: YOU GET AN "F" 
Clue: ...in biology if you actually pick up the poison dart species of this amphibian

Answer:
frog