Are all atheists this ill-informed about religion?

[Thumpalumpacus]

Trinity  1+1+1 = 1

Not even good math.

I've been through this with anti-Trinitarians before on a Christian forum.  The mistake here, is that you are stripping the description or category from the equation.

So using P for person, you get 1P + 1P + 1P = 3P   Which is what the doctrine of the Trinity states.  It also states that the 3 Persons = 1 God. They are separate and distinct individuals who can interact with each other, which are equally and fully of the same nature and substance of 1 God.

And it is still an incoherent explanation. How does one personality inhabit three bodies -- well, two bodies, and, I don't know, some misty fog or whatever this Holy Spirit thingy is?

Oh, and while we're at it, we'll need to define the differences between "person" and "god".

Argumentum ex culo.