Recently，in a QQ group，some members were discussing the invocation of spirits, and a materialist asked them to prove spirit creatures exist.
First of all, I don’t think he has enough scientific literacy, for he said the quantum theory is merely presumption.
His core idea is that everything that exists can be observed. But magicians (or sorcerers?) who have experienced invocation don’t think that we can observe spirit by physical means.
According to a magisician, there is unphysical phase of unphysical being, and spirits are unphysical by their nature, therefore they are not able to be physically seen.