The other word that is missing, but is often used in discussions is "proximity". I don't see why having your arm in an unnatural position but close to a player is OK. You could go in close and spread your arms like a goalkeeper and say "proximity" means it's not handball
The FAQs don't seem to have been updated. The final one is:
An attacker (Team A) attempts to pass the ball. A defender (Team B) makes a slide tackle to block the pass. The ball touches the right arm which is clearly extended away from the body and is not supporting the body. What is the correct...