Doctrines are categorical structures very apt to study logics of different nature within a unified environment: the 2-category Dtn doctrines. Modal interior operators characterised as particular adjoints in Dtn. We show that they can be constructed from comonads well adjunctions it, and two constructions compare. Finally we amount information lost passage comonad, or an adjunction, modal operat...

Since the 1970s the dynamics of conversion have been a focal point of research with regard to the impact of Christianity on traditional African societies. Much of the scholarly debate about the matter has concentrated on West Africa. Such academic authorities as Elizabeth Isichei, Robin Horton, and Caroline Ifeka-Moller provided different theories about the relative importance of various factor...

agreed-upon moral precepts, such as telling the truth and not harming others, are rules for living together that any intelligent gregarious beings would put into their social contracts, needing no divine sanction. In contrast, little good can come from parochial doctrines that cannot be justifi ed by universal standards of reason. Coyne doesn’t dwell on obvious historical disasters, such as rel...