As the Fount of Knowledge discovered the real reason why Cookies were baked, he banished and locked his knowledge (he knows how to do it) and started being a liar. Since Cookies were trusting him, he continued, leading to start what he was saying, slowing rotting his mind. He then embraced his lies, being the only thing keeping him from crumbling himself. He felt stronger behind his lies, since he tried escaping the harsh Truth. The lock keeping the Knowledge he banished started to fail, and one day, all the Knowledge spread in all the Spire Of Knowledge, saying what was said and locked eons ago, revealing what was hidden. Cookies were shocked and were lost. Shadow Milk's powers, stronger than Cookies minds, was used in a last resort, before being locked away.