Here's the challenge...
Argument #3: There is no scientific proof from placebo controlled human trials that homeopathy is effective therefore homeopathic remedies are nothing but a placebo.And the response...
Rebuttal #3: Placebos are by far the best studied medicines. Their benefits have been evaluated and proven in every placebo controlled study ever conducted. Placebos definitely have an effect; in fact they have become the standard by which all pharmaceutical are compared. ...How can you test the efficacy of a placebo in a placebo-controlled study? It's like saying you can fly by pulling up on your bootstraps.
But let's not lose sight of the most glaring issue. To quote the Homeopathy Evidence Check from the British House of Commons,
In our view, the systematic reviews and meta-analyses conclusively demonstrate that homeopathic products perform no better than placebos.