The Enthymeme
Derived from the Syllogism (a logical argument in 3 parts):
A Major Premise...All men are mortal
A Minor Premise...Socrates is a man
A Conclusion...Socrates is mortal
The Enthymeme removes one or more pieces of the Syllogism. It relies on the reader understanding what is missing and how the missing part completes the idea (i.e. the Enthymeme relies on pre-existing knowledge, beliefs, attitudes, or understanding).