From a much longer article on homeopathy at

http://arstechnica.com/articles/culture/the-pseudoscience-behind-homeopathy.ars/1
For a brief explanation of why Homeopathy is BS check out the master in action
http://www.youtube.com/watch?v=BWE1tH93G9U
here he extends his Million Dollar challenge to Homeopaths
http://www.youtube.com/watch?v=U3WnEo46h4A

The symptoms of pseudoscience

Those of you who slogged through to the conclusion might be expecting to see a diatribe against homeopathy in general. But, if the practice of homeopathy turns water into a mechanism for helping individuals feel better via a placebo effect, then the only issue with it becomes ensuring that it doesn't prevent people who really need medical intervention from getting it.

But a subset of the homeopathic community has consistently demanded that their practice be viewed as scientific, presumably to obtain the credibility that traditional medicine receives. As our article reveals, they hope to achieve this without actually engaging in scientific practices. In doing so, they have adopted many of techniques used in other fields of pseudoscience:

• Ignore settled issues in science: We know a great deal about the behavior of water (and evolution, and other contentious topics), but there are many efforts to introduce new science without ever addressing the existing body of knowledge. As such, many of the basic tenets of topics such as homeopathy appear to be ungrounded in reality as we understand it.
• Misapplication of real science: Quantum mechanics is an undeniably successful description of parts of the natural world, but the limitations of its applicability are widely recognized by the scientific community, if not the general public. Pseudoscientists such as homeopaths appear to cynically target this sort of ignorance by applying scientific principles to inappropriate topics.
• Rejection of scientific standards: Over the centuries, science has established standards of evidence and experiment to ensure that data remains consistent and reproducible. But these strengths are presented as weaknesses that make science impervious to new ideas, a stance that is often accompanied by...
• Claims of suppression: Pseudoscience is rejected because it does not conform to the standards held by the scientific community. That community is depicted as a dangerous hegemony that rejects new ideas in order to perpetuate a stifling orthodoxy. This happens in spite of many examples of radical ideas that have rapidly gained not only acceptance, but major prizes, when they were properly supported by scientific evidence.
• A conclusion/evidence gap: Many areas of pseudoscience do not set out to examine a phenomenon but rather have the stated goal of supporting a preordained conclusion. As such, they often engage in excessive logical leaps when the actual data is insufficient to support the desired conclusion.
• Focusing on the fringes: All areas of science have anomalous data and anecdotal findings that are inconsistent with the existing understanding. But those anomalies should not obscure the fact that the vast majority of current data does support the predominant theories. In the hands of a pseudoscientist, these unconnected edge cases are presented as a coherent body of knowledge that supports the replacement of existing understandings.

Perhaps the clearest theme running through many areas of pseudoscience, however, is the attempt to make a whole that is far, far greater than the sum of its parts. Enlarging a collection of terminally-flawed trivia does not somehow strengthen its scientific significance. This is especially true when many of the components of the argument don't form a coherent whole. For example, quantum entanglement, structured water, and silica are essentially unrelated explanations, and any support for one of them makes no difference to the others. Yet, somehow, presenting them all at once is supposed to make the case for water's memory harder to dismiss.

In extracting these consistent themes, it was remarkably easy to recognize similar instances of most of them in many of the more contentious areas of pseudoscience, such as intelligent design, creationism, and denial of the HIV/AIDS connection. We've intentionally avoided discussing those topics in detail, but we hope those who read this article are willing to perform that exercise on their own.