Smith and Jones

The first counterexample by Gettier was the existence of Smith having strong evidence for a conjunctive proposition as such:

(a) Jones is the man who will get the job, and Jones has ten coins in his pocket.

Smith's evidence for the above proposition might be that the president assured Smith that Jones would get the job. Smith may have also counted the coins in Jones' pocket. From this Smith infers the following:

(b) the person who gets the job has ten coins in his pocket.

Let's suppose that Smith accepts B based on proposition A. In this case Smith is justified in believing that B is true.