an old mental dilemma

[Hawks Coach]

Mark
You can make any of those foul calls in the travel/OOB scenarios. But you can also rule otherwise.

Rule 4
SECTION 19 FOUL
ART. 1 . . . A personal foul is a player foul which involves illegal contact with an opponent while the ball is live, which hinders an opponent from performing normal defensive and offensive movements. A personal foul also includes contact by or on an airborne shooter when the ball is dead.

A1's contact with B1 hindered A1's ability to make normal offensive movements and caused A1 to travel/lose the ball OOB. If B1 doesn't suffer from this contact, does it need to be a foul?