This guy writes test cases

[text] When was 4 my sister was 2. am now 44. How old is my sister Samuel Lipoff studied at Harvard University inled 13 This is a tough one. She might be 42 but she could be 41 or 43 also since you dont say when your birthday is and her birthday is. Also she could be dead. Finally you might have thought she was your sister but actually your mom had an affair with another man and the woman who is 13 younger than you is not actually your sister. But your mom may have given away your real sister for adoption in which case shes probably older than you. See why its tough Finally what if you think your sister is dead but she actually has become an astronaut on a secret government project for near lightspeed travel Then yourslsterwouldbcaglngmslowlymmyw.so