outhouse
Atheistically
they can tell that it fits first century (or earlier) Roman bath style
Carbon 14 dating was done on 3 samples of charcoal, each was found to come from a very different time period, indicating the bath house had been used in multiple periods, and at least was used sometime between 1300-1400, although with only 3 samples dated, it is possible for the bath house to be older
I understand what your saying but,, a few different people dont have in nailed as first century. Look at how many mistakes were made before it got labeled right [ish] Yes I did see one person who stated that but other dates were thrown out as well.
If those bath houses looked the same for a 200-500 year period then you dont have enough to go off to determine nazareths historocity