Roughly, a dichotomy is more like a division or separation between two things: it stresses that the two are different. A duality may be where the two things are similar, aspects of the same thing.

What is an example of a dichotomy?

Dichotomy is defined as a sharp division of things or ideas into two contradictory parts. An example of dichotomy is grouping mammals by those that live on land and those that live in water. A separation or division into two; a distinction that results in such a division.

What are the two types of dichotomy?