what are that makes this case different is ms. wangd she feels very strongly that she was denied a promotion because of her gender and feels other engineers have been denied advancement and is willing to take this case to trial. emily: how do we know she was denied these things based on her gender and not performance? jason: this is a class-action case and in many of these cases discrimination cases are individual cases. in this case she's seeking to represent all the women engineers at twitter and the case is based on a theory called dispretty impact and what that means is basically the promotion process, while maybe it wasn't devised to discriminate against women, the impact of the process adversely affects women. to put it i simply it took women longer to get promotions and fewer women had promotions we might expect. emily: ellen powell felt passionate about her case. what makes this case different? >> ellen was really about ellen powell and there were discrimination claims in her suit but there was a lot of harassment and more focu