conclusive / coherent
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conclusive
Logical, consistent, and convincing. Used for arguments, plans, or explanations that are internally coherent and easy to understand.
Der Detektiv präsentierte eine schlüssige Theorie zum Tathergang.
The detective presented a conclusive theory about how the crime happened.
'Schlüssig' (conclusive/coherent) is related to 'der Schlüssel' (the key) and 'schließen' (to close/conclude). A conclusive argument is one in which all the parts fit together like a key in a lock and form a logical, 'closed' whole.
Seine Erklärung für die Verspätung klang nicht sehr schlüssig.
His explanation for the delay did not sound very conclusive.
This adjective typically describes abstract concepts that can be logical. Common combinations are: 'eine schlüssige Argumentation' (a conclusive argument), 'ein schlüssiger Plan' (a coherent plan), 'ein schlüssiges Konzept' (a coherent concept), or 'eine schlüssige Erklärung' (a conclusive explanation).
Die Polizei braucht einen schlüssigen Beweis, um den Fall zu lösen.
The police need conclusive evidence to solve the case.
'Schlüssig' (conclusive/coherent) is often used predicatively with verbs like 'sein' (to be), 'wirken' (to seem), or 'klingen' (to sound) to express an evaluation.
Der Plan für das neue Projekt wirkt auf den ersten Blick schlüssig.
At first glance, the plan for the new project seems coherent.
round / about
An argument is schlüssig (coherent) when its ideas build on one another logically and the conclusion can be followed. It seems rund when it also covers all the important aspects and is convincing as a complete whole.
Die Argumentation ist schlüssig, weil jeder Gedanke logisch aus dem vorherigen folgt.
The argument is coherent because each idea follows logically from the previous one.
Die Argumentation wirkt rund, weil sie alle wichtigen Aspekte berücksichtigt.
The argument feels well-rounded because it takes all the important aspects into account.
