>>14179720if you look back in the history of string theory, there was a time when strings were not considered fundamental, and the most common idea was that strings were made of fermions (basically because all real “things” are made of fermions).
if you watch Lenny Susskind’s intro lectures on string theory on yt you will find he discusses this.
however the current consensus on string theory is very ambivalent—it doesn’t matter what strings are made of or if they’re fundamental since actually there are a lot of “dual” ways to answer that question and in any case we “don’t really know” what string theory “really is” (according to Witten and everyone else)
