I read on Stephen Gray's discovery of conductor and insulator. From that I came across a question that how cork, wood, rope can act as conductor being an insulator but then I got the answer that it is because of the humidity.
But that answer made me more confused. You must be thinking why? If humidity can make those insulator to act as conductor then other insulator assume silk that might have been used in Stephen Gray's experiment must act as a conductor as a result there will only be the discovery of conductor then how he discovered insulator (as insulator acting as conductor)