Somehow, my links are not working. When I click on them, they add a bunch of letters after the file extension.
http://cafefiles.naver.net/data8/2005/5/21/49/%BC%F6%B9%DA%C8%F1_1.jpg
This picture's left guy looks like frontal slap. (The arm is fully extended. It's a frontal strike, either with palm slap or with Knife Hand. Frontal Knife Hand strike or a frontal slap. And it looks more like a frontal slap.) Also, Subak had punch like many reputable sources I quoted. Also, Breaking was self-created as a circus with trial & error (& wrestling's power motion knowhow, how to put in body momentum hard, how to swing arm hard).
Pictures are a legitimate proof. In specific sports, there are few motions & moves that can look like certain pictures. If you rule out the motions not in the sports, the pictures look like specific motions like Subak's frontal slap or Gwonbub's pictures or Kyuksul pictures.
In Gwonbub's case, it was not only the similarities in pictures to Taekwondo but also the identical name that led me to investigate Gwonbub's connection to Taekwondo.
All my proofs & inferences are smooth enough & impeccable. When a claim is supported by evidences, if there is no logical necessity or proof against it, it is good enough & smooth enough. You guys are just quibbling.