but I just believe that maybe he might not have strictly followed the rules may be he used a double head "##coated##" #coin# i.e the coin those not have a "tail" due to this reason there would be 100% probability of showing a 'head' .

This is a thought experiment, it isn't real, so the coin was a real coin, that you yourself gave to our pretend magician.

The point of the article is to show that many people doing many things, can create results that look fantastic if you don't know the bigger picture.

Cg