Woody wrote most of the songs he sang...Pete wrote only a few....but 'folk' is partly a style, partly an attitude, partly an age..(like antiques..they need SOME definition about heritage)..partly how they are used, (sung with, or 'at', or 'to' others)...partly musical 'style'...partly...well, you get the idea... it ain't easy...but it sure is easy to tell what it ISN'T in many cases