I've been thinking about the California Supreme Court's decision lately, but in formal logic terms. It seems we have two input requirements that can only be met by one result:

1) Gay couples and hetorsexual couples must have the same rights or else the anti-discrimination language of the State Constitution is violated.
2) Prop 8 added language to the State Constitution that "marriage" is reserved only for heterosexual couples.

The four possible results would be:
1) Both gay and hetero couples can marry.
2) Hetero couples can marry but gay couples can not.
3) Gay couples can marry but hetero couples can not.
4) Neither gay nor hetero couples can marry.

Only one of those results satisfies both inputs. If the CSC doesn't throw out one or both of the inputs, then nobody can marry in California. All marriages are declared "civil unions", and Prop 8 actually destroys marriage in our state.