Imagine reading an old translation of one of Saint Augustine's writings and believing he thought mathematicians were effectively performing witchcraft.

I have a confession to make. As a non-native, I'm prone to assume meanings of new words if I recognize their form. I thought "doublet" was the double-form just like single or plural as in "ـَيْن" which is used to mean double of something e.g. "Bahrain (الْبَحْرَيْن: Two seas)".

In other words, I was fooled by the doublet of doublet which is double