Well, it’s Friday, the last day of another work week—the first full week of August (or Sexember, if you prefer) in 2025. And here I am writing things that, so far, are not only trivial but banal. Perhaps, as I go along, I will write something more interesting and surprising, but so far, I’m not impressed with myself. I guess these things happen.
I did not end up riding my new bike back to the house last night, because there were thunderstorms in the area, particularly down by where I live. I’m not too intimidated by riding a bike in the rain, but it’s a new bike, and its configuration is different than the type to which I am used, and it is slightly wobblier than my normal, so I felt it wasn’t a great idea to ride it five miles in the rain. It turned out the rain was almost over by the time I got to my train stop, but it was nevertheless still quite wet and puddly, and I probably was wise-ish to avoid riding in it.
Still, it’s slightly frustrating. Hopefully, today it won’t be an issue, because it would be a shame to miss the whole weekend with it by the house. There are supposed to be thunderstorms today again, but they are expected earlier in the day than yesterday, and the weather is predicted to clear by early evening. That should be fine, at least.
Of course, weather prediction is never perfectly precise—Chaos Theory being applicable and all that—but forecasts done for only twelve hours or so in the future are likely to be much more accurate than those for a day or a few days or a week ahead of time. After about five days, trying to get too specific a forecast is a bit of a waste of effort, and it may always be. One cannot, with finite computing power, calculate things to infinite precision, and without infinite precision, in the long term, Chaos makes one’s predictions ever more inaccurate.
Of course, that raises (not “begs”!) the question of whether reality is actually defined in any meaningful sense down to the level where limitless precision would apply. In other words, are Real Numbers actually a thing that exists in reality? That may seem a strange question, given that they are called “Real Numbers”, but that’s just a name, given by humans as a file heading if you will, a way to index the subject. It doesn’t actually signify the reality of the real numbers, any more than those who call themselves “Conservative” in the current US are in any legitimate sense conservative by most agreed upon uses of that word.
Of course, all non-complex numbers are Real numbers, and all Real numbers can be considered complex numbers (just with a zero i component if they are only Real). The counting numbers are still Real numbers, as are all the integers and fractions, and of course, all our best known “irrational”* numbers, like π and e. But the vast majority of Real numbers cannot be specified by any reductive formula or algorithm, but have do be described digit by digit, forever—maximum information-type entropy.
So, to describe fully a “typical” specific Real number usually requires infinite information, with infinite precision. But there’s a real (haha) question whether any portion of reality is defined so precisely, or whether that could even have any meaning. As far as we currently know, the smallest distance that has physical meaning is the Planck Length (about 1.6×10−35 m), and the shortest time that makes physical sense is the Planck Time (about 5.4×10−44 s), and so on. These are very tiny numbers, but they are finite, not infinitesimal, and are certainly not infinitely non-repeating decimals.
But does the Planck Length (and Time) apply to actual, bottom-level reality, or is that merely a limit within the constraints of our current understanding? We don’t know, for instance, how such things apply to gravity when it becomes strong enough for such scales to apply.
It’s mind-boggling, or at least wildly stimulating of probably inexpressible thought, that reality may be only finitely defined at every given point in space (which “points” themselves would only be finitely packed, so to speak, such that below a certain scale, the distance between two points would have no meaning) or that it may in fact be infinitely defined, down to the fully expressed Real Number level, and that indeed it may be infinitely divisible in the same sense Real Numbers are—and thus there would be, between any two points in spacetime, as many points as there are in ALL of spacetime.
Either possibility is wildly cool and difficult to represent internally—indeed, impossible to represent perfectly internally, but difficult even to contemplate roughly at any very deep level. Is it any wonder that people like Cantor and Gödel were mentally ill, given the kinds of things they contemplated and explored? I’m not saying those things were the reason for their illness; that would be a cheesy sort of magical thinking, redolent of an H. P. Lovecraft story. But the contemplation of infinities and complexity and chaos is both sobering and intoxicating at the same time.
What do you know, I drifted into less banal areas after all. I guess that’s a decent way to end the work week of blog posts. I hope you all have an interesting and good weekend, without too many utterly unpredictable events (unless they’re good ones for you).
*Just to remind you, this does not refer to numbers that are in some sense crazy, just that they cannot be expressed as a ratio of two integers, no matter how large the integers. That’s the original meaning of the word irrational, but the very fact that there existed such numbers seemed so horrifying to the old Pythagoreans—or so I’ve heard—that it almost immediately acquired it’s secondary, now more common, usage.




