The problem with opinions is the fact that we can only lie or be wrong. The problem with this fact is that if we admit that we lie, then we open for being wrong, whereas if we admit of being wrong, we open for lying. There’s no ground between lying and being wrong.
Science is practically useful, but can just be wrong. The problem with this fact is that if science admits that this is the case, then it opens up for lying. It means that scientists have to choose whether they shall admit the truth that science just can be wrong, and thereby open up for lying, or pretend that science can find the truth. Faced with this choice, most scientists choose to pretend that science can find the truth (although knowing it can’t).
I, however, think that we have to acknowledge facts to develop. Humanity as a whole can’t develop without acknowledging facts. Acknowledging facts may ultimately not lead to development, but then so be it. We did what we could.
Another contribution to understanding of conceptualization http://menvall.wordpress.com/