Their logic was based around 1 sentence and completely forgoing the rest of the paragraph.
"If any models cannot disembark because of enemies or because they would end up in impassable terrain, the unit can perform an 'emergency disembarkation' - the models are deployed anywhere within 2" of the vehicles hull..."
They say that superceeds the "models cannot disembark within 1" of an enemy."
I laughed at them and let it go, as we weren't playing for money or anything, but it was pretty annoying. Especially after telling them for 15 minutes that their logic was warp spawned.