Representative-elect Alexandria Ocasio-Cortez (D-NY) supports expanding Medicare to people under 65, what’s known as single-payer or Medicare-for-all. But the big question is how to pay for all that health care. Ocasio-Cortez claimed on Twitter that $21 trillion in “Pentagon accounting errors” could have paid for 66 percent of the Medicare-for-all proposal.

However, that $21 trillion is not one big pot of dormant money collecting dust somewhere. It’s the sum of all transactions — both inflows and outflows — for which the Defense Department did not have adequate documentation. This means the same dollar could be accounted for many times. For this, the Washington Post gave Ocasio-Cortez four Pinocchios.