There are only two hard problems in computer science: 0) Cache invalidation 1) Naming things 5) Asynchronous callbacks 2) Off-by-one errors 3) Scope creep 6) B

There are only two hard problems in computer science: 0) Cache invalidation 1) Naming things 5) Asynchronous callbacks 2) Off-by-one errors 3) Scope creep 6) Bounds checking