schlüssiges
Schlüssiges is a German adjective that translates to coherent, conclusive, or convincing in English. It is used to describe something that is logically sound, well-reasoned, and easy to understand. For example, a schlüssiges argument is one that is persuasive and leaves no room for doubt. A schlüssiges conclusion is one that is supported by the evidence and follows logically from the preceding statements.
The word schlüssiges can also be used to describe a plan or a solution that is well-thought-out
In essence, schlüssiges implies a sense of completeness and irrefutability. When something is described as schlüssiges,