It's not what you think. When looking at the chronic deceit of Paul Ryan it is difficult to pick out which of his tall tails is the worst. Is it the medicare lie where the destroyer claims to be the savior? The lie where he claims Obama's the liar regarding the workers of the closed GM plant? The personal beliefs lie where he claims to be a charitable Catholic while in fact he has for decades idolized Ayn Rand, the selfish atheist, over that socialist do-good-er Jesus.
No, these lies all pail to the biggest deceit of the master manipulator that is Ryan. As anyone who's ever dealt with a chronic & habitual liar knows their most dangerous lies are those deliberately planed and executed to make you believe they are honest. These are the lies that suck you into their complex web, to mold your mind so you are more likely to believe they are "honest" and trustworthy. The "honest" admit their mistakes and so can be trusted when called on other issues in dispute.
So, what would Ryan do when everyone was calling him out for being a liar? It's the oldest and most dangerous trick in the book for the pathological liar. Admit to the small lie so they will believe the rest. At first I couldn't fathom why Ryan would lie, to an extent as bordering on the outlandish, about running a marathon at the racers time of under 3 hours. He had to know he would be caught, he had to. So why? Because he wanted to be caught, this time.
We'd now think him more honest so we'd believe his other bigger lies. "Come on, you can trust me I told the truth and admitted I was wrong, didn't I". This was deliberate, premeditated, planned and executed so as to be plausible, truly the work of the pathological fabricator. Do not trust this man, ever.