Alchemy is a protoscience that contributed to the development of modern chemistry and medicine. narrow-minded and science are two opposite things. Science is about seeking and finding knowledge and truth. Blind devotion to something in spite of evidence is by definition narrow minded. Religiosity for example is an example of narrow minded reasoning. Madness is the belief that things that are false are true, and that things that are true are false. And since alchemy is not madness, then it can only be called mad in a lie. The real question is why do people lie about things they don't understand? So, why do you ask such a dishonest and loaded question? Are you trying to make a point based on a lie? Or did you believe someone else's lie and are now repeating that lie?