Science is not “true.” Science is ambitious: it is a quest, a sense of wonder, an idea. Science sets up a framework for answering diverse and complex questions about the nature of existence. What most people do not understand is that science is not designed to “prove” anything, and it certainly isn’t designed to argue against that which it can’t quantify (not all hypothesis meet the criteria of science). Science observes, it gets feedback, and it makes reasonable hypotheses – but then it keeps going, exploring, learning. So if one’s argument is (using deGrasse as an example) the generalized statement that GMOs are harmless, one cannot use science to “prove” that fact, and yet that’s exactly how many statements are made – as “true.” Righteous scientists and those who quote scientific theory as dogma risk damaging the integrity and reputation of the scientific community that should inspire a continuing exploration of truth rather than isolating and intimidating those with alternative viewpoints. I personally find deGrasse rather arrogant and stunningly mis-informed about pockets of science that he has little education in.
The amazing thing about science is that it can give us power – power to explore so many viewpoints with a critical and open mind, leaving judgement behind, teaching us patience and expanding our creativity. Science, of course, can give us sound theories with which to march forward with confidence in our goodness and ability to affect great change. Paired with our sense of humanity, those scientific theories often seem like “common sense” when we believe our actions to do no harm.
So one might say that science is “true” so long as it can accept criticism in the name of progress, keep an open mind and a willingness to change, choose compassion over judgement, and allow that same sense of wonder and passion for exploration in the many areas beyond the limits of science.