Homeopathy is a type of alternative medicine based on two ideas: that “like cures like” (similia similibus curentur), meaning that a substance that causes disease symptoms can also cure those same symptoms; and that dilution increases potency. Both ideas are not only the opposite of what medicine usually observes, but the opposite of common sense, too.
Continue Reading: Homeopathy – RationalWiki.
Selection bias partly explains why there are reports of many satisfied customers who go to psychics, tarot card readers, palm readers, faith healers, acupuncturists, homeopaths, and others who provide bogus treatments such as mistletoe for cancer. The unsatisfied customers are either not asked for their opinion, they’re too embarrassed to give it, or they’re dead.
via Unnatural Acts that can improve your thinking: selection bias.