"It turns out that up until September 8, Wikipedia was pretty clear: while the phrase has been applied to “various” policies, it is almost entirely associated with the one Gibson was asking about, preventative war. After the Palin interview aired, the Wikipedia entry was changed more than 100 times, as Palin apologists literally rewrote the definition to retroactively make their candidate look less ignorant."

— The Palin Doctrine | Radosh.net