(Abstruse means obscure, or difficult to understand or comprehend.)The professor's lectures were so abstruse that students tended to avoid them. ''His films are as abstruse and abstract as any art...
When it has a subject, verb, punctuation, capitalization, a predicate, and a complete thought. A sentence is a sentence when it is handed down by a judge (or a magistrate).
No, it is a proper sentence. The subject is 'You', the verb is 'overflowed', and 'it' is the object of the sentence. All it needs is a period at the end.