Ben Carson is standing by his theory that the Egyptian pyramid theory — that the pyramids were built by the biblical figure Joseph to store grain — which has come under scrutiny since Buzzfeed surfaced a 1998 video of Carson referencing it.

“Some people believe in the Bible, like I do, and don’t find that to be silly at all, and believe that God created the Earth and don’t find that to be silly at all.” Carson told reporters in Miami during a stop on his book tour. “The secular progressives try to ridicule it any time it comes up and they’re welcome to do that.”

Carson also defended the idea Wednesday evening when asked by reporters about it.

“The pyramids were made in a way that they had hermetically sealed compartments. You wouldn’t need hermetically sealed compartments for a sepulcher. You would need that if you were trying to preserve grain for a long period of time,” he said, according to MSNBC.