person A: i am so disappointed in myself_comma_ i could have do so much better at work but i guess it wasn't my day_comma_ i was not able to focus
person B: I liked my friend very much and believed that he can not talk negatively about me
person A: what makes you so sure? anything can happen i mean just look at murphy's law 
person B: May be you are right. But sometimes_comma_ you go with your heart not with the law. Murphy's law may not work in every situation.