Dance and leaky abstractions

Performance is a very practical activity, corresponding to what computer people like to call an implementation, the act of actually doing something, the opposite of theories and specifications that explain how things should work or are meant to work. "Dance" is as any implementation vulnerable to what programming guru Joel Spolsky calls "leaky abstractions".

In performance, the abstractions are theories and intentions, and the unpredictability of spectator readings the primary source of leaks.

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