Not a certainty, just a very high probability that it will ....
It is reminiscent of when the prosecution was taking its turn in picking the O.J. murder jury. One of the D.A.'s was trying to explain circumstantial evidence to a prospective O.J. juror.
He (or she) said something to the effect of: "If I drop my pencil and you see it hit the floor, that is direct evidence that it hit the floor. But if I drop it behind the table here, that is circumstantial evidence that it hit the floor becasue you can reasonably infer that it hit the floor."
"No," insisted the typical jury pool prospect,"You might have some kinda net hidden back there to catch it befo' it hits the flo'."