[spunkets]

"'All kinds of science but the common denominator is a search for knowledge."

The common distinguishing feature is that science requires the scientific method. The search for knowledge in general does not.

[jwalsh07]

The common distinguishing feature is that science requires the scientific method.

No it isn't. The lcd is the search for knowledge. Junk scientists, social scientists and the natural scientists all use different methods so your statement can not be true.