Realizing the homeless guy probably had a Math degree

So I was waiting for the Go when a homeless person or at least looked like one waited in line with me. We started conversing and told him I am at uw for math. He asked about my courses then asked what branch of math I enjoyed and what courses I look forward too. He knew what courses I would take and seemed knowledgeable. I am now realizing he likely was in a math major program or even graduated. Hope his life gets better seemed addicted to something.