Or someone is just burying their head in the sand...
"You said that the net worth goes up and down based upon your own feelings?" he was asked in the deposition.
"Yes, even my own feelings, as to where the world is going, and that can change rapidly from day to day," Trump responded.
In the deposition, the attorney presented estimates of his net worth by two banks where Trump had applied for lines of credit. Both concluded Trump was worth about a third of the $3.5 billion he claimed in 2005.
Trump said the numbers were wrong and the banks did not do an exhaustive search of his assets.
On the campaign trail Trump boasts that he is not a politician, but under oath, he said he spins his business like any politician.
"Have you ever lied in public... about your properties?" he was asked.
"I try and be truthful," he said. "You always - when you are making a public statement - you want to say it the most positive way possible. I'm no different from a politician running for office."
Trump's 2006 lawsuit was dismissed. He appealed and lost the appeal.
The appeals judges found there were no "obvious reasons to doubt the veracity of [his] informants or the accuracy of [their] reports."
This piece has been updated with a statement from O'Brien: "Donald Trump lost his lawsuit and it didn't cost me any money to litigate it. The central tenets of his complaint -- that the book inaccurately or maliciously described his troubled business history and his exaggerations or misrepresentations around his wealth and success as a dealmaker -- didn't hold up in court. These continue to be important issues in this presidential campaign, even if Mr. Trump wants to dismiss or diminish them."