1.
various theories; multiple accounts; different opinions
A collection of different theories, opinions, or explanations about a topic. Often used to indicate that the truth is uncertain or debated.
語源には諸説ある。
There are various theories about the etymology.
諸説あるが、最も有力なのはこの説だ。
There are various theories, but this one is the most credible.
この遺跡の年代については諸説紛々で、未だに定説がない。
There are many conflicting theories about the age of these ruins, and no established view yet.
Very frequently appears in the set phrase 諸説あり or 諸説ある (there are various theories), used as a disclaimer when presenting information that is not definitively established. 諸説紛々 means "opinions/theories are in wild disagreement." The prefix 諸 means "various/many" and appears in other compounds like 諸国 (various countries) and 諸問題 (various problems).