I really wish the game would tell you important stuff like this in the unit details when building it (buying it) or at least in the Civilopedia. Btw only because of this forums and only yesterday I finaly realised HOW to make inquisitors at all. Few times I used the "start inquisition" button on an apostle, but as it did nothing (and the apostle disappeared), I releaded. I expected it to have the same effect as inquisitors had in CivV (and as in fact they have also in CivVI).
The game won't tell you ANYTHING about this at all.
(Similarly, offtopic, - "medic heals adjanced units". Wow. But when and how much?)