Earlier quoted context omitted.
That's technically true, but irrelevant, at least in the context of what Carson said. Carson's comment was that the pyramids were built by Joseph to store grain. This is significant because Joseph prophesied seven years of famine and urged the Egyptians to store grain against it (Ge41). So anything built "by Joseph to store grain" would have to hold a lot of grain.
@nightspirit Ben Carson is a Seventh-day Adventist and he does believe that the Pyramids of Giza were built by the Biblical Joseph to store grain. I'm sure he's also interested in gaining the support of Christian and Jewish voters but this is ultimately an example of one of his personal beliefs.
If anything that will loose him Jewish votes.
According to Jewish history Josef stored grain in the year 1532BCE, but the pyramids were mostly finished by 1759BCE, more than 200 years earlier.
If you are going to base a belief in the Bible, maybe actually know what it says first?