If you are smart you like Math. $$(P\to Q)$$ If you like Math you get a good job.$$(Q\to R)$$ Thus
If you are smart you get a good job.$$(P\to R)$$
If you are smart you like Math. $$(P\to Q)$$ If you like Math you get a good job.$$(Q\to R)$$ Thus
If you are smart you get a good job.$$(P\to R)$$