al-Thurayyā (the Pleiades), and Suhayl married al-Thurayyā and was united with her; therefore Suhayl (Canopus) has come into conjunction with these Pleiades.” And so forth.

It is well known that the direction which he maintained was something existent, independent of whatever occupies it, is not the space that every body must have. This is further clarified by the fourteenth argument: he said that