Ambinder lists them:

Here are the relevant facts Walker finds:

1. Marriage is and has been a civil matter, subject to religious intervention only when requested by the intervenors.
 
2. California, like every other state, doesn't require that couples wanting to marry be able to procreate.

3. Marriage as an institution has changed overtime; women were given equal status; interracial marriage was formally legalized; no-fault divorce made it easier to dissolve marriages.

4. California has eliminated marital obligations based on gender.

5. Same-sex love and intimacy "are well-documented in human history."

6. Sexual orientation is a fundamental characteristic of a human being.

7. Prop 8 proponents' "assertion that sexual orientation cannot be defined is contrary to the weight of the evidence."

8. There is no evidence that sexual orientation is chosen, nor that it can be changed.

9. California has no interest in reducing the number of gays and lesbians in its population.

10. "Same-sex couples are identical to opposite-sex couples in the characteristics relevant to the ability to form successful marital union."

11. "Marrying a person of the opposite sex is an unrealistic option for gay and lesbian individuals."

12. "Domestic partnerships lack the social meaning associated with marriage, and marriage is widely regarded as the definitive expression of love and commitment in the United States.
The availability of domestic partnership does not provide gays and lesbians with a status equivalent to marriage because the cultural meaning of marriage and its associated benefits are intentionally withheld from same-sex couples in domestic partnerships."

13. "Permitting same-sex couples to marry will not affect the number of opposite-sex couples who marry, divorce, cohabit, have children outside of marriage or otherwise affect the
stability of opposite-sex marriages."

Remember, these are the FACTS that Walker has determined from the testimony and evidence. These facts will serve as the grounding for the legal arguments yet to come.

And, yes, they are facts. But they are also arguments, irrefutable arguments that yield only to the principle that change to an existing institution should be considered carefully and prudently. It's now 21 years since I first articulated the conservative case for marriage equality. Today, the compelling logic of the case reaches what can only be called an apotheosis.