BAIT-AND-SWITCH FEMINISM on the Patriarchy: “So, for example, we are told that the patriarchy causes male rape. We are told that if we want to fight male rape, the best way to do so is to work hard to promote feminist principles. But once feminism has been promoted, the particular feminists benefitting from that extra social capital may well be the ones to successfully lobbying national governments to keep male rape legal on the ground that if raping men was illegal, they might make false accusations which could hurt women.”

One can, as the author does, refer to this as a motte-and-bailey tactic:

[The motte and bailey is] a form of medieval castle, where there would be a field of desirable and economically productive land called a bailey, and a big ugly tower in the middle called the motte. If you were a medieval lord, you would do most of your economic activity in the bailey and get rich. If an enemy approached, you would retreat to the motte and rain down arrows on the enemy until they gave up and went away. Then you would go back to the bailey, which is the place you wanted to be all along.

So the motte-and-bailey doctrine is when you make a bold, controversial statement. Then when somebody challenges you, you claim you were just making an obvious, uncontroversial statement, so you are clearly right and they are silly for challenging you. Then when the argument is over you go back to making the bold, controversial statement.