Charlie Catlett (born 1960) is a Senior Computer Scientist at Argonne National Laboratory and a Senior Fellow in the Computation Institute, a joint institute of Argonne National Laboratory and The University of Chicago, and a Senior Fellow at the University of Chicago's Harris School of Public Policy. Using only the above description and what you know about the world, "Charlie Catlett has two vowels in his last name." is definitely correct, incorrect, or inconclusive? 