Logos
Logos is persuasion by the use of reason and logic. Of all the three techniques, Logos is said to be the most important and it was Aristotle’s personal favourite. Logic is at the heart of any good argument and, more often than not, wins out in the end over anything else used in the debate of any kind. The importance of logic in an argument cannot be overstated.
In a brilliantly written essay, one should be able to combine all three to create an argument that would be impossible to ignore. Each on its own is powerful, but a combination of all three is formidable indeed. Of all of them, be most cautious with the use of Pathos. The reason for this is that humans are so different from each other that it is impossible to assume all would feel the same way about or agree on the argument you are making. When using Pathos in an essay, bring it down to the basics of humanity as much as possible; focusing on black and white instead of the numerous grey areas.