[D-fendr]

Question: How does the calculation know for certain that prices will actually come down exactly equal to the corp. income tax amount?

[RobbyS]

Cain knows that economics is more like poker than chess.

[SaraJohnson]

Question: How does the calculation know for certain that prices will actually come down exactly equal to the corp. income tax amount?

---

They made it up under the assumption that no one would use that tax change to increase their profits.