Edu Strabo, as noted, was mistaken concerning the origin of circumcision. Perhaps it is the case that Strabo, or his source, associated circumcision with some Hasmoneans because of the military expansion and some forced conversions of that time. Solomon Zeitlin was quite a learned scholar. Other scholars apparently suggest not using Josephus on Essenes, while citing him on all else.
Some inscriptions come to scholars with no provenance.
Qumran ostracon 1 was found in an archaeological dig. GD wrote, e.g., that line 7 letter 2 is an aleph not a he. But how he translates this line I have yet to read. In addition to the date formula, and the price, one could add the witness signers, etc. I suggest it is also reasonable to explore, at least, the relations of the text with Serek ha-yahad and Josephus and the archaeology, which are not only quite near in time and space, but, also, I think, in meaning.