Letter: Base judgements on facts, not bias

In a 2011 study, teachers gave red shirts to half a group of preschoolers and blue shirts to the other; they then wore them for three weeks.Teachers neither discussed the shirts nor incorporated the colors into exercises. Yet when asked which color was better, kids chose their own, saying people with their color were smarter than the others.Biases start early. But as adults, we learn to base opinions on facts. Or do we?Consider climate change. More than 90% of the world’s scientists believ