Conversation

That is definitely what I've found, and try to communicate to people, especially designers and artists. Losing those constraints can foster different creative processes, but there are tradeoffs when you make that decision.
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Constraints can encourage creativity, sure. But if you constrain too much -- and I think the Haskells of the world do -- you lose the freedom to express new ideas. e e cummings wantonly violated spelling, formatting, and grammar, and his poetry is all the better for it.
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The beauty of math is you have the freedom to change the rules, so long as your consistent. The rules and constraints themselves are something to play with creatively. Wanton mispelling is one such creative adventure into different 'rules'.
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