If the scientists who discovered electricity wanted first to know how this phenomenon was produced before they would use electricity, then most probably we would still be in darkness. It took a hundred years to develop the theory that electricity is the movement of electrons, and even today we do not know the nature of any type of energy, including electricity. Homeopathy uses a type of energy unleashed through the process of potentization (not through simple dilution, as was shown in the film). The fact is that at this moment we do not have conclusive evidence of what the nature of this energy is. Generally, energy is defined only as 'that which has the ability to produce some effect'. Homeopathy therefore must be accepted or rejected on its therapeutic effects alone.

-- George Vithoulkas, International Academy Classical Homeopathy (note bene: this one has quite a few fallacies in it, so take your pick).

What type of fallacy is this and why?