How to define a term as slippery as 'cool'? I've a feeling that any attempt in that direction would be, well, more than a little un-cool.
I'll content myself with a modest certainty that I recognize it when I see it.
Take last Sunday afternoon.
A gentleman, en route to a 'do', has had the misfortune of his car breaking down.
The members' rescue service comes to his aid.
To have the AA arrive promptly may be regarded as good fortune.
But to have its red, yellow and black livery blend exactly with your clan's tartan?