Twitter Inc denied Elon Musk’s accusations in a Delaware court filing on Thursday that he was duped into signing the contract to purchase the social media business, calling them “implausible and contrary to truth.”

Musk made the charges in a sealed countersuit filed last Friday that was made public on Thursday.

“According to Musk, the billionaire creator of numerous companies who was instructed by Wall Street bankers and attorneys, was duped into signing a $44 billion merger agreement by Twitter. That claim is as unbelievable and contradictory to reality as it sounds “Twitter argued in a lawsuit posted on Thursday.