-and some student sociologist might care to base his thesis upon the phenomenon- Hello,everyone Here I am feeling confused about a sentence in the following paragraph : ( That the equipment of modern camping becomes yearly more sophisticated is an entertaining paradox for the cynic, a brighter promise for the hopeful traveler who has sworn to get away from it all. It also provides-and some student sociologist might care to base his thesis upon the phenomenon -- an escape of another kind. I wonder know what the differences are between the use of" em rule" and""comma" ,and the meaning of "--and" in this paragraph, Personally,the structure of this sentence is a little strange for me to get understand, Could I say like : It also provides, some student sociologist might care to base his thesis upon the phenomenon. an escape of another kind. (PS: Could I say: "another kind of escape" as well ? ) Thanks a lot for your time to read my message : D