Back when I started historical fencing, I thought about what is a martial art and came up with a definition which worked for what I was doing (ie. trying to learn to fight a particular way). Someone interested in martial arts communities might chose a different definition: someone is an Olympic wrestler or SCA heavy fighter because they participate in a certain kind of event, and how they move is irrelevant.
Definition: A martial art is a subset of all the possible ways of moving effectively in combat which works well together and is sufficient to solve a martial problem.
We shall divide this sermon into six parts.