[borroka]

What about "strong opinion when there is strong evidence"? Otherwise, you have absurdities like that of the author of the article, who told everyone and their cousins that, for example, 4 hours of sleep was enough and then realized he needed more sleep. He had a strong opinion without solid evidence. The "loosely held" part is meaningless, of course (in theory...) one has to change opinion when the evidence changes.