Having recently got back into TKD I'm looking at it afresh. Especially in light of my experiences in other arts in the intervening time between being "in" TKD initially and then now. Trying to pick through the "DNA" of TKD and making sense of how it is today and what I can draw from it. In particular I'm wondering what is "unique" to TKD? Anything? We all know (I hope) that the major component of ITF TKD is re-jigged and re-arranged shotokan karate (which is in itself re-jigged okinawan karate). We all know (again I hope) that Won hyo is very similar to Pinan ichi/Heian nidan and Po Eun is clearly drawn from the tekki/Naihanchi katas. Most of the other kata have elements that are almost directly taken from Karate kata. Many of the main techniques have direct Karate equivalents (obverse/reverse punch, middle blocks, low blow, rising block, front kick, side kick etc). So where do any additions or subtractions come into effect? Any additions from other arts? The encyclopedia has Judo throws for example but these don't seem widely taught in TKD. Hee il Cho has incorporated boxing style punching into his TKD from the early 80's IIRC and some of the early military pioneers also had boxing experience.