Passed on Foul, so Passed on the Travel

[CDurham]

We had a play where a player gets hit and loses his balance. Foul? Well my partner passed on it and the player falls to the floor in control of the ball. Travel? My partner passed on this as well since he did not call the foul which caused the travel.

I have never heard of this philosophy, not saying that is wrong, of passing on 2 things when one caused the other. Does anyone view this situation as my partner did (didnt call the foul so you cannot call the travel). Wouldn't you have to get one or the other. I see it as necessary to call the late foul, but can also see his argument as well, of passing on both if you do not get the culprit which was the foul.