you have to say "Black Lives Matter" in such a way as to signify support for a movement that calls itself that, not to say that literal black lives matter.
"I wonder if my esteemed colleague would come to the floor right now and state, unequivocally, that water is wet."
"... That's incredibly stupid."
"It appears that my colleague does not believe that water is wet."
"No, I just don't want to be coerced into saying a self-evident statement--"
"Until he publicly agrees with me and says that I'm right, let the record show that my colleague believes water to be dry."