Verse

If we can't converse

We will have to diverse

If the environment is adverse

We will have to reverse

If we don't want to reverse

We will be called perverse

P.S. Black Scholes equation is a reverse thermodynamic equation. If a reverse equation is so useful, one might expect the regular equation is even more useful. You are right. For details please see

生物學的統一理論

http://blog.sciencenet.cn/blog-2912119-1019964.html