It seems to me that every state or object or being has 2 phases, whether it be good/evil, on/off, positive/negative, energy/matter…
Is there anything that really truly is neutral? Is there any being or object or anything that has 3 states of something/neutral/anti-something?
eh, I don’t really have an opinion either way.
But seriously, can you really say to me, “I am fatdave, and I am either good or evil. If I am one I cannot be the other.”?
I don’t think most things can truly be looked at dualistically like that.
IANAphysicist, but I believe that quarks have 3 states. Ones that are spin up, ones that are spin down, and ones that are other/both, or something.
Binary reductionism at its best.
I disagree that the universe can be so neatly dichotomized.
There are two kinds of dualities: those that duality describes, and those that it doesn’t.
Which side of a sphere is the left side? And is it so because there is a leftness in a sphere or because you conceived of a relational dichotomy and imposed it on the structure?
Is eating tuna for dinner good or bad necessarily? Must it be one or the other? In what way?
We can always create dichotomies. The question should be when is it appropriate. Of course every object with extension is either exactly three meters or it isn’t. Ain’t gonna build a skyscraper with that kind of measuring, though. 
Finally, electrically, isn’t a neutron not positively charged and not negatively charged?
fatdave: matter itself has multiple distinct states (solid, liquid, gas).
Although there appears to be much discussion on whether these three are the only ones possible (I seem to recall reading about ‘room temperature ice’ and crystal lattice arrangements in gaseous states), then there’s plasma…