Imo, Armando Lopez , your query depends very much on the respective discipline. The course of cognition in relation to human life phases depends on the field of cognition. Although the eyewitness is the worst witness, in social science a higher age can increase overall knowledge, in terms of life-span developmental learning.
A different course can certainly be assumed for practical surgery.
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Neither by nature, then, nor contrary to nature do the virtues arise in us; rather we are adapted by nature to receive them, and are made perfect by habit, said Aristotle.