It’s not like the science get devalued if it’s discovered twice
If the knowledge discovered has a value X, then discovering it twice gives the discovery an average value X/2, and discovering it thrice gives the discovery an average value X/3.
This is of course a simplification, because the confirmation received from having multiple copies of the discovery is itself of some value, which flattens the value curve; however the value of a confirmation decreases with each confirmation already extant.
If the knowledge discovered has a value X, then discovering it twice gives the discovery an average value X/2, and discovering it thrice gives the discovery an average value X/3.
This is of course a simplification, because the confirmation received from having multiple copies of the discovery is itself of some value, which flattens the value curve; however the value of a confirmation decreases with each confirmation already extant.