World English Dictionary
pros and cons
pl n
the various arguments in favour of and against a motion, course of action, etc
[C16: from Latin prō for + con, from contrā against]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Idioms & Phrases

pros and cons

Arguments or considerations for and against something, as in We'd best weigh all the pros and cons before we decide to add a new wing to the library. This idiom is taken from the Latin pro for "for" and con for "against." [Late 1500s]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
Each technology has its pros and cons, and each must be a part of any
  conversation about literacy and learning.
It seems to capture much of the pros and cons of what you are describing.
Before casting off your real-estate albatross, carefully weigh the pros and
Ask students to share their thoughts on the pros and cons of each destination.
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