question: What did Ulam think of von Nuemann 's cognitive ability ?
answer: von Neumann 's way of thinking might not be visual , but more of an aural one .
turker_answer: Ulam thought that von Neumann 's way of thinking was an aural one , not a visual one .
rule-based: Ulam thought von Neumann 's way of thinking might not be visual , but more of an aural one of von Nuemann 's cognitive ability .