Much has been made of House Speaker Paul Ryan’s pledge that he will not accept the Republican presidential nomination if an open convention chooses him this July. We are expected to believe that this mere statement has definitively settled the issue and that there are no circumstances under which the Wisconsin Republican will be the party’s nominee.

Hogwash. Ryan’s statement settled nothing. In fact, his recent behavior — making a highly publicized speech and cutting a web video in which he went out of his way to be statesmanlike — indicates the opposite. These moves give every appearance of Ryan making himself available as an alternative. Even his protestations of disinterest are part of the silly dance expected of candidates.

History shows us that declarative statements are not binding. In 1944, President Franklin D. Roosevelt released an open letter in which he said that if he were a delegate to that year’s Democratic convention, he would vote to renominate his vice president, the ultra-liberal Henry Wallace. Meanwhile, behind the scenes, Roosevelt was actively working with Wallace’s detractors to ensure the nod would go to Senator Harry Truman, who succeeded Roosevelt as president when FDR died months later.

Politicians lie about their intentions all the time, so why should we automatically believe Ryan?

Oh, but we are told that this pledge is so ironclad that if he broke it, he’d be finished in politics.

Nonsense. There are all kinds of ways to wiggle out of a pledge. Imagine we’re going on the third or fourth ballot at a chaotic GOP convention, and Ryan says this:

“As I have repeatedly said, I did not want the nomination. But many leaders in our party who I respect greatly have told me that I am the only person who can unite our party and lead us to victory in the fall. I cannot in good conscience refuse this call, and so it is with great personal reluctance that I have decided to accept my party’s nomination for president of the United States.”

There. It almost sounds noble, doesn’t it?

Never take any politician at face value if he or she disclaims any interest whatsoever in being president. If the nomination is gift-wrapped and handed to Ryan on a platter, he’ll take it, just the same way he took the speakership he said he had absolutely no interest whatsoever in taking. Don’t be naive. Ryan’s past pledge meant nothing, so why is this one guaranteed to be for real?