“The derivative of problem creation $\frac{dC}{dt}$ must always be $\leq$ the derivative of problem-solving $\frac{dS}{dt}$.” Essentially, you must always be solving problems more or as efficiently as you are creating them. If you’re creating more problems than you’re solving then you have a real problem. Net zero equality is fine because a steady state of problems to solutions is healthy. Don’t be unrealistic, your problems will never converge to zero, and it’s actually more healthy for them to stay away from zero.