Contradiction 

The article contradicts itself.

"Uses" says:

 Player A, with 510 plate appearances and 400 at bats, gets 100 hits during the season and finishes with a .250 batting average. And suppose Player B, with 490 plate appearances and 400 at bats, gets 110 hits during the season and finishes the season with a .275 batting average. Player B, even though he had the same amount of at bats as Player A and even though his batting average is higher, will not be eligible for season-ending rankings because he did not accumulate the required 502 plate appearances

But "Rule 10.22(a)" shows the correct rule. The "uses" example is wrong because that player will be 110/412 (.267) even after the 12 ABs are added, and that's still better than .250

Someone correct this article