In their searing speech against Donald Trump this week, the parents of deceased US Army Captain Humayun Khan suggested that Trump has not read the US Constitution — citing as exhibit one Trump’s plan to ban Muslims from entering the US, which likely violates the First Amendment’s protections for the free exercise of religion.

Trump first responded with cruelty and inaccuracies to a family that lost a loved one to war. But then Trump released a written statement responding to the Khans that actually seemed to prove their claim that he hadn’t read the Constitution (emphasis mine):

While I feel deeply for the loss of his son, Mr. Khan who has never met me, has no right to stand in front of millions of people and claim I have never read the Constitution, (which is false) and say many other inaccurate things.

This — freedom of speech — is actually among the first rights outlined in the Constitution’s Bill of Rights, along with freedom of religion, of the press, of assembly, to petition the government. If Trump hasn’t even read that far, can we be really sure that he really has read the full US Constitution?

Watch: This election isn’t just Democrat vs. Republican. It’s normal vs. abnormal.