Deontology is not in general incompatible. You could have a deontology that says :God says do exactly what eliezer yudkowsky thinks is correct.
That isn’t a deontology. That is an epistemic state. “God says do X” is in the class “Snow is white” not “You should do X”. Of course if you add “You should do exactly what God says” then you have a deontology. Well, you would if not for the additional fact “Eliezer Yudkowsky thinks that God saying so isn’t a particularly good reason to do it”, making the system arguably inconsistent.
That isn’t a deontology. That is an epistemic state. “God says do X” is in the class “Snow is white” not “You should do X”. Of course if you add “You should do exactly what God says” then you have a deontology. Well, you would if not for the additional fact “Eliezer Yudkowsky thinks that God saying so isn’t a particularly good reason to do it”, making the system arguably inconsistent.