Complex sentence: Though considered to exclude one another, the concepts of something and nothing can coincide under special circumstances an example would be when a person says "I am doing nothing" but they are really doing something, because it is physically and mentally impossible to do nothing.
Split into simpler sentences: Though considered to exclude one another, the concepts of something and nothing can coincide under special circumstances. One example would be when a person says "I am doing nothing"; they are really doing "something", because it is physically and mentally impossible to do nothing.