Suppose Abraham Lincoln (February 12, 1809 – April 15, 1865) was an American statesman and lawyer who served as the 16th president of the United States from 1861 until his assassination in 1865. He led the nation through a great constitutional, military, and moral crisis - the American Civil War.
Can we infer that "Abraham Lincoln served as the 15th president of the United States."? Yes, no, or maybe?