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;; (car ''something) is treated by the interpreter as:
;; (car (quote (quote something)))
;; The first occurrency of 'quote' quotes the next entity
;; (quote something),which is actualy a list with two elements,so
;; caring this list yileds 'quote.However,this is just a quoted
;; symbol,not a procedure,typing quote in the interpreter prints:
;; =>(#@keyword . #<primitive-macro! #<primitive-procedure quote>>)
;; whereas typing 'quote just yiled it literally.
note that (car '(list 'a)) returns list.
Similarly, ''abracadabra is translated as '(quote abracadabra) and car it will return "quote" (the second quote)