Morden quantum phisics shows us that things can be changed by obseving them. The basis of witchcraft is if you think about it is making observations. From this deduct that wit craft does in fact have a scientific basis.
This can be shown through Schrodinger's Cat theory. A cat is put in a box with a time release bottel of poison. The person outside the box opens it at a predetermained point. whilst the cat is in the box it exists in a state of both dead and alive, this is called a quantem super postion but if the cat is observered during this time it no longer exists in the super positoin and is either dead or alive. So you see observing the cat makes it change.
Through close analasis of this data you can see that observing something does in fact make it change.