A premanent edge is the ability to recognise if and when an advantage is presented, and first of all to be able to recognise with unerring certainty the most likely order of magnitude of success in advance of a committment being made, or the contrary.
Then also at the same time an escape route is visualised in case the result delivered ultimately is the opposite of the one expected or even if it is not, but not up to expectations in volatile or unreliable scenarios.
And all of this in a flash, much more quickly in thought that can be expressed in words (because there is no time to dither or consult notes).
Additionally this ability contains within it several components that must be evenly balanced and harmonious to each other, briefly, firstly a deep resource of knowledge and expertise upon which to draw unerringly and immediately without hesitation or doubt.
Secondly a specifically developed and honed armoury of skill sets each developed and perfected to deal with separate scenarios.
Thirdly the ability to remain calm and impartial and devoid of all emotion whatsoever.
Fourthly the developed faculty to be able to futurologise.
Fifthly the ability to respond in a nanosecond if necessary by snap response to a given unexpected development if necessary.
Sixthly the maintenance and suspension of a supercooled mental state combining total alertness total relaxation and total imparitality and to be able to sustain this supercooled mental state indefinitely on command, at will, without effort for however long it is needed.
These six things have to be done at the same time, so we are talking of multitasking of the highest order.
A temporary edge is a minor version of the fully fledged and refined faculties described above and pertaining to anomalies or situations that are known not to be reliable in the sense they are not likely to persist for significant periods of time which present opportunities that are there for the taking, but only for the properly skilled.