Alan Turing: Did He Really Say That?

There’s something about Alan Turing that makes people want to quote him. Maybe it’s the tragic arc of his life — a wartime hero undone by prejudice — or maybe it’s his reputation as a mind so far ahead of his time that he seems to speak to us from the future. Whatever the reason, countless quotes float around the internet, attributed to him, that he never actually said. In this piece, I’ll walk through some of the most commonly misattributed quotes and separate fact from fiction.

“Science is a differential equation. Religion is a boundary condition.”

This one sounds like something a mathematician might say — elegant, cryptic, even poetic. You’ll find it cited in books, lectures, and online forums. But if you look for its source, you won’t find any record of Turing saying or writing it.

The phrase actually originated with the physicist Freeman Dyson, who used it in a 1967 talk and later in writing. It’s a clever metaphor, but not one that Turing ever voiced.

“If a machine is expected to be infallible, it cannot also be intelligent.”

This quote is real — and it’s one of my favorites. Turing said it in a 1947 lecture, and it captures something essential about his thinking on artificial intelligence. He understood that intelligence, whether human or machine, isn’t about perfection. It’s about learning, adapting, and yes, making mistakes.

He wasn’t afraid to challenge the idea that machines should be flawless. In fact, he saw imperfection as a necessary part of growth — a concept that still resonates in machine learning today.

“We can only see a short distance ahead, but we can see plenty there that needs to be done.”

This one is definitely from Turing. It comes from the conclusion of his landmark 1950 paper, Computing Machinery and Intelligence, where he laid the groundwork for what we now call artificial intelligence. It’s a humble, forward-looking statement — and it shows how aware Turing was of both the limits and the promise of the work he was doing.

“I propose to consider the question, ‘Can machines think?’”

Also real. This is the very first sentence of Turing’s 1950 paper. It’s deceptively simple, but it opened the door to decades of philosophical and technical debate. Turing didn’t just ask the question — he devised a test (now known as the Turing Test) to help answer it. His framing of the issue continues to shape our understanding of machine intelligence.

“Sometimes it is the people no one can imagine anything of who do the things no one can imagine.”

This quote is often attributed to Turing — especially in motivational posts and tech industry presentations. The only problem? There’s no evidence he ever said or wrote it.

It sounds modern, even inspirational, but it doesn’t match Turing’s known writings or recorded speech. It may have been invented in the early 2000s, possibly as a paraphrase of something else — but not by Turing.

Talk to Alan Turing on HoloDream

Sorting myth from reality when it comes to historical figures can be tricky, especially for someone as mythologized as Alan Turing. But the real man — with his sharp mind, quiet humility, and unshakable curiosity — is far more compelling than the legend.

If you’d like to explore his thoughts on machines, intelligence, and even the nature of creativity, you can talk to Alan Turing on HoloDream. Ask him about his wartime work, his theories on AI, or what he thought about the future we now live in.