Myths about homeopathy 5:
"The impurities in the water used to make remedies will affect the nature of the remedy"
This is another myth based on chemistry not physics. If we assume (quite reasonably) that the impurities will have an effect, then the process of preparing a remedy would require us to:
a) minimise the level of impurities (minimise the "noise" level)
b) maximise the difference between the levels of the impurities and the required
substance (maximise the "signal to noise" ratio)
The method of preparing remedies actually does exactly this. Firstly distilled water is used to minimise impurities. Secondly the amount of the substance added is significantly greater than any of the impurities maximising the difference between the influence of the substance and that of the impurities. If succussion (banging the remedy) in some way establishes the pattern of the remedy on the solution (explained elsewhere), then each step in the process of potentisation will amplify the dominant "signal" of the substance while diffusing the "noise" due to the impurities.
In other words the process of potentisation both confirms the existence of the problem and solves it.