Theravada subforum or not, there is more than one meaning of enlightenment in Buddhism.
If we assume the question refers specifically to the Theravada meaning of 'enlightenment' then that may narrow things down a little.
PeterB wrote:Your second point Shonin begs the question outlined above..if the same truth has been uncovered by others perhaps you could point to an example of this ?
In particular could you point to an example in a non Buddhist setting of anything like Paticcasamuppada ?
If we take that as definitive of enlightenment then that would be a key question. Paticcasamuppada is basically interdependence - because this arises, that arises.
Deep Ecology, Chaos Theory, and the Yin-Yang principle of Taoism and Advaita Vedanta could all be said to be saying much the same with slightly different terms and scope.
It's also closely related to the philosophical principle of causality.
But if we insist on a specific formulation then (unsurprisingly perhaps) no other philosophy has come up with Paticcasamuppada in those exact terms.