In the movie, Erin was able to tell you anything at any time about all of the 634 Hinkley residents affected by PG&E Company.  In real life, Erin actually did memorize all of the cases.  However, the movie leaves out the detail that she was dyslexic and this is why she memorized all the plaintiffs and their cases.  Also, in the movie Erin says how she is going to use her cleavage to manipulate the employee at the water board facility to get the files she needs for her research.  Although this did happen in real life, she did not intentionally use her cleavage to get what she wanted. Yet another true fact in the movie was when Erin said, "We had that water brought in special for you folks," to the defense attorney.  She actually said this in real life in a court of law, but in the movie it was said in an office meeting room.  This quote had more of an effect in the court room because there were more witnesses to see that even the company wouldn’t drink their own water.