Efficiency must be one kind of cool. The other kind I can think of may be examplifed by Matt Demon in the movie “Bourne Indentity“.
What do you think about cool?
To me, being smart and elegant is definitely a cool thing…
Unfortunately, these qualities are mainly born, rather than learned. Therefore, cool, in your definition, has nothing to do with the efforts in life.
A MAN OF ACTION 
To me, being smart and elegant is definitely a cool thing…
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Unfortunately, these qualities are mainly born, rather than learned. Therefore, cool, in your definition, has nothing to do with the efforts in life.
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‘Cool’ is supposed to be effortless, right? Trying to be cool itself is not cool.
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Before you can be cool ‘effortlessly’, you need to be ‘trained’ in that way as ‘Mai4 You2 wong1’.
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