Only a philosopher would ask this question, let alone attempt to address it. But that’s what Raymond Tallis did in a 2-page article in Philosophy Now (Issue 172, Feb / Mar 2026).
This is the letter I wrote in response. It’s pretty self-explanatory.
I always like to read Raymond Tallis because he forces you to practice philosophy, especially if you disagree with him. Such was the case when I read his thesis on The Possibility Bearing Animal, where he concludes that “probabilities are no more objective in the physical world than are possibilities, which of course exist only insofar as they are envisaged” (italics in the original). Implicit in this statement is the belief that probabilities are a function of the mind only, and without a mind to perceive them, they would have no physical manifestation. I’m confident that he would not disagree with my rewording of his core idea.
If you read Erwin Schrodinger’s remarkable book, What is Life? he starts by emphasising the role of statistics in physics with the statement, “…the laws of physics and chemistry are statistical throughout.” This is true even without considering quantum mechanics, for which Schrodinger is most famously known, and for which he coined the term ‘statistico-deterministic’ to describe it.
Schrodinger was disappointed and frustrated that his eponymous equation required Max Born’s technique of converting the wave function into probabilities to make it relevant to the physical world. But here’s the thing: that conversion to probabilities has made his equation one of the most successful and enduring in the history of physics. Yes, it has limitations, but so does all mathematical physics. (It’s the reason that physics is a neverending endeavour, no matter the field.) This, of course, goes to the heart of Tallis’s thesis.
What Tallis is talking about is the distinction between epistemology and ontology, though he doesn’t specifically frame his discussion in those terms. Freeman Dyson, who was a key contributor and collaborator to Richard Feynman’s QED (yet missed out on a Nobel Prize), once warned about the reification of the wave function – making an abstract concept real. Dyson pointed out in a lecture (later turned into a paper) how quantum mechanics cannot describe the past, but only the future, which is why it can only deal in probabilities.
Probabilities were originally devised to explain events that people previously believed could only be determined by God. But this is common in the history of physics, including the movements of the planets in the solar system. So I agree with Tallis that probabilities are an epistemology, but they give us knowledge about future events that actually occur, therefore are inherently ontological.
The best example is radioactive decay, which we know is manifest as a half-life, and is very accurate within a specific range (the range varies for different isotopes). But here’s the thing: it’s impossible to predict the decay of an individual isotope (relevant to Schrodinger’s cat thought experiment), yet it’s extraordinarily, even preternaturally accurate, holistically. My point is that the half-life happens objectively and independently of any human mind, yet it’s determined by a probabilistic phenomenon.
Afterword:
I limited my response to under 500 words, whereas Tallis’s treatise is much longer. There is more to this than I felt could be addressed in a Letter to the Editor.
Note how I tied my last statement to my rewording of his conclusion. I knew all along that I would use radioactive half-lives as my example to demonstrate what I saw as the error in his argument. But I snuck up on it, so-to-speak. I don’t define what I mean by ‘a probabilistic phenomenon’ yet the world is full of them, and it’s the key to my response, because I obviously believe they actually exist. Whereas Tallis effectively argues they only exist in someone’s mind.
The thing is that probability, as a formal device (not a colloquial expression), is always a number between 0 and 1, therefore it’s inherently mathematical. That aspect of it is somewhat ignored by Tallis, yet I don’t address it in my letter either. It’s something I would introduce later if we were engaged in a philosophical debate, because, from my perspective, it underlies what this is all about.
Mathematical physics is an epistemology, meaning it’s all about knowledge, and since the 20th Century, it often describes an ontology we can’t directly see or experience, yet we know it’s true within specific boundaries. Probabilities are part of that epistemology, but Tallis can discount them because they deal with the future, therefore with events yet to be actualised (by definition) - a point he makes himself. But here’s the thing: they make predictions that are highly accurate – quantum mechanics being a case-in-point.
The point I’d make is that while there is a distinction between epistemology and ontology, there is also a connection. Without an underlying ontology that it addresses, an epistemology is meaningless. This is a point I was attempting to make in my letter without saying it out loud. So how do we know an epistemology is true (as per my assertion in the previous paragraph)? Because we can make measurements. A mathematical epistemology can only be verified with numbers. In the case of probabilities, we do this by counting.