I wonder if there can be such a thing as a true, but non-predictive proposition? Basically, that’s what the proposition, “God exists”, is sometimes claimed to be — a true but non-predictive proposition.
A proposition such as, “The sun will rise tomorrow”, obviously makes a prediction. So does a proposition such as, “The sun rose yesterday”, although many of us might be a bit confused about using the word “prediction” to refer to something that has already happened. But that’s OK — we’re just using “prediction” in the special way it is sometimes used in logic. In logic, a proposition’s “prediction” is sometimes defined as whatever a proposition asserts to be true. So, even though it might not be the smoothest way to say it, you can indeed speak of “predicting past events”.
Sometimes when people say things like, “God exists”, they do not mean to make any predictions and yet they feel their proposition is true. Yet how can you say that a proposition which makes no predictions is true or not? For don’t we judge whether a proposition is true or not by whether it’s predictions have come true?
So, can there be a true, but non-predictive proposition? I think at best we are logically required to say that non-predictive propositions can not be determined true or false.
At any rate, that’s what I’ve been wondering about today. But now it’s time to get ready to go to the coffee shop. Adios!