Note that “cause, without effect” does include the possibility of “a particle and anti-particle spontaneously enter the universe AND have a measurable effect on said universe before vanishing”. I can’t think of any reason to conclude that this is impossible, and it would certainly be meaningful. The point still stands that such events would by necessity be random processes, not ones that correlate with the world—you can’t gain actual information on what card someone drew this way.
Note that “cause, without effect” does include the possibility of “a particle and anti-particle spontaneously enter the universe AND have a measurable effect on said universe before vanishing”. I can’t think of any reason to conclude that this is impossible, and it would certainly be meaningful. The point still stands that such events would by necessity be random processes, not ones that correlate with the world—you can’t gain actual information on what card someone drew this way.