"...they would not admit this sentiment into their arguments because..."

“The very desire to preserve animals was a subjective sentiment of fail in the animal's intrinsic worth. It was a feeling possessed by most of the scientists there, who regarded the wildebeeste migration with the same awe that others feel for the Mona Lisa, but they would not admit this sentiment into their arguments because it could not be backed up by facts; the right and worng of aesthetics being imponderables not open to scientific analysis. At the end of the meeting there was a consensus of opinion on only one fact, that there was an urgent need for research before taking any hasty action.” 

― Ian Douglas-Hamilton, Among the Elephants