(noun) a resolving of specific cases of conscience, duty, or conduct through interpretation of ethical principles or religious doctrine / (noun) specious argument; rationalization
is he constructing a casuistical theory to excuse his own failures?
It is evident that there was, in 1800, casuistry enough in the theology of all the available English churches to reinforce the manufacturer’s own sense of moral self-esteem.
the first time I had a real chance not to be complicit with evil, I found I had a staggering gift for casuistry