a matter of conjecture(is ~: Whether this type of attack is a calculated act by an intelligent and malign entity or a programmed reaction from an unmanned probe type of craft is a matter of conjecture, as no entities were seen in either of the previous cases. (Janet & Colin Bord, "Unexplained Mysteries of The 20th Century")ART Vancouver)
make wild guesses(We can only make wild guesses based on the historical record. • At best, we can only make wild guesses about what other people believe and desire.4uzhoj)
