when somebody says, "I do," at the altar, in the context of a marriage''Ido

 when somebody says, "I do," at the altar, in the context of a marriage

ceremony, says, in the act of saying those two words, they're not just describinG

something, they're not referring to an external reality, they're actually doiNG

something, something that is going to change their legal status, their political

status, Suddenly they are married.

so the speech act performative precisely in that it brings about a new reality.