He knows enough of 20th/21st century speech patterns to know that the statement involving Booster Gold was rhetorical. Still, he files that name away to ask about later. Perhaps it was the name of someone who did interfere with causality.

Still, the question does merit an answer.

"It is a misapprehension born of underinformed theory. My people exist outside of time. Our presence alone is unregisterable. It is only through action that we become involved in the causal nexus."

He should know.