In the hard sciences, you are absolutely right. In social sciences, I am not certain you are correct, there is at least a solid counterargument. All social sc

In the hard sciences, you are absolutely right. In social sciences, I am not certain you are correct, there is at least a solid counterargument. All social sciences are dealing with topics with numerous confounding variables that cannot be removed, and many others that they do not try to remove.Common sense on the other hand is the accumulation of your observations of humanity over a lifetime. I think Mr. Grellas' statement may be too strong, the social sciences likely will eventually catch up to and surprass any individuals common sense in understanding humanity. But I think that day is a very long way away and it will likely include the subjective observations of trained and worldly observers like Desmond Morris even when it does arrive. For the forseeable future, I suspect he is right and that the common sense of an observant and worldly person is a better predictor of human behavior than the formal social sciences.