I think it's helpful to focus on when things write to a shared resource or utilize something that may have been changed elsewhere. Any subsequent read of that

I think it's helpful to focus on when things write to a shared resource or utilize something that may have been changed elsewhere. Any subsequent read of that resource may change. In face, in a poorly designed system you could read a value as it's being changed, for example, a function walking a string as the string's memory is released.