Isolated practice of a specific skill, even for extended periods, without exposure to broader knowledge or diverse techniques, will not lead to the same level of development as contemporary training methods.

“If we go on top of some mountain, 20 people, 20 normal individuals, and we spent 20 years just fighting four hours in the morning, four hours in the afternoon, and we do it for 20 years, but we're isolated from any other source of knowledge, we would still not reach anything that a very young fighter these days has.”