He asked whether machines can think, decided the word "think" was too vague to argue about, and replaced the question with a game instead. That paper came out in 1950 and the test still carries his name every time a chatbot fools somebody. Before that he spent the war at Bletchley Park, where the intelligence produced is estimated to have shortened the fighting by two to four years. The country he served treated him abominably. The field he invented never stopped needing him. For people who built the thing everyone now takes for granted.

An Alan Turing graphic tee for computer scientists, mathematicians, and anyone working in a field he invented. The portrait cut in fine engraved linework, suited and tie-knotted, the way a face is rendered on currency. A gift for programmers, students, engineers, and the quietly foundational.