rationale
noun
[ ˌraʃəˈnɑːl ]
• a set of reasons or a logical basis for a course of action or belief.
• "he explained the rationale behind the change"
Similar:
reason(s),
reasoning,
thinking,
(logical) basis,
logic,
grounds,
sense,
principle,
theory,
philosophy,
hypothesis,
thesis,
argument,
case,
motive,
motivation,
the whys and wherefores,
explanation,
justification,
excuse,
vindication,
raison d'être,
Origin:
mid 17th century: modern Latin, neuter (used as a noun) of Latin rationalis ‘endowed with reason’ (see rational).