Extra-point assignment

In class we discussed two versions of definition for an ambiguous grammar.  They are: You'll receive 1 extra-point (counted as 1% of the total grade) if you can either prove or disprove that these two definitions are equivalent.  Send your answer directly to me to cding@cs.rochester.edu.  The acceptable file formats are plain text, pdf or postscript.  The deadline is 3:25pm next Thursday (9/28).