How to determine if a class meets the single responsibility principle?

Question

The Single Responsibility Principle is based on the high cohesion principle. The difference between the two is that a highly cohesive classes features a set of responsibilities that are strongly related, while classes adhering to SRP have just one responsibility.

But how do we determine whether a particular class features a set of responsibilities and is thus just highly cohesive, or whether it has only one responsibility and thus adheres to SRP? In other words, isn't it more or less subjective, since some may consider a class very granular (and as such will believe the class adheres to SRP), while others may consider it not granular enough?