" Science could potentially do a better job explaining the meaning of life if scientists devise experiments that can weed out the best answers from the worst. The principle difference between religion and science is as follows: the religious make stuff up to explain what they don't understand. Scientists do the same, but scientists run their ideas through a very rigorous filter that consists of logic, experimentation and peer review. Such a filter eliminates the worst ideas and preserves the best.So if a scientist answers the question, " What is the meaning of life," his answer, at the very worst, is no less valid than an answer that comes from the highest witchdoctor or priest. "