Harvard Law Professor Emeritus Alan Dershowitz on Friday rejected the idea that Supreme Court nominee Brett Kavanaugh's accuser should be believed simply because she is a woman, and said people who say "I believe her" are basing that assessment on almost zero evidence.

"The most disturbing thing is these people who are on television, some people I know and respect, [who say] 'I believe her,'" Dershowitz said on Fox News.

"You never met her. You don't know anything about her," he said. "Are women born with a special gene for telling the truth, and men with a special gene for lying?"

"I don't believe her. I don't believe him," he added. "I have an open mind, I want to hear both sides of the story and make a determination."

Dershowitz warned against the creation of multiple standards of justice in America, and said that would lead to a politicization of the justice system. He said in this case, the decision to confirm or not confirm Kavanaugh should be based on evidence, "not genetic belief in the inferiority or superiority of one gender."

Democratic supporters of Kavanaugh's accuser, Christine Blasey Ford, have said they found her story "credible." Ford said Kavanaugh sexually assaulted her in 1982 when they were both in high school, at a party where he threw her onto a bed, groped her, and tried to remove her clothes.

Kavanaugh has denied it ever happened, and has agreed to testify to the Senate Judiciary Committee about Ford's claim. Ford has said she is willing to testify next week in some capacity, but not on Monday, and only if her safety is guaranteed.