noun-modifying (irregular)
consistent; coherent
Used prenominally to describe something that is logically consistent from start to finish, such as a story, argument, or policy.
His explanation was consistent.
A consistent policy is necessary.
一貫した is a more common and general word for 'consistent', while 首尾一貫した emphasizes consistency from beginning to end and is more formal.
筋が通った means 'logical' or 'making sense', focusing on internal logic rather than consistency over time.
Compound of 首尾 (shubi, 'beginning and end') and 一貫 (ikkan, 'consistency'), with the prenominal form of する (shita).