Thanks, Xotl!
The dissenting opinion was such that because the wording did not include a qualifier, they understood it to be definitive: If a unit becomes stuck, it IS displaced; and since "Displaced" (TW pg151) does not describe that ONLY those cases/actions defined by that section can trigger a unit to be Displaced, the argument was that the description of "Units that get stuck are still displaced" (TO 62) was implied as being added to the TW "Displaced" rule.
By adding the condition of "IF" to "displaced", the rule changes from absolute, "Is displaced when stuck".
(this was a 90-minute debate of, "But that's what it means, if" vs "but that's not what it says".)