M: I'm feeling a bit unlucky in Pokemon Go, and I'm trying to figure out if it actually was unlucky. Yesterday was a community day. I caught... ...something like... ...100 creatures. None of them had higher than 40 out of the possible 45 IV points. Go online if you need to, because you need to know what that means if you've forgotten or don't know. But I'm trying to figure out what the probability of catching 100 creatures and not getting higher than 40 out of 45 is.

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G: Short answer:
No, that’s not especially unlucky. For normal wild spawns, there’s about a 42% chance that 100 catches will all be 40 IV or lower, so what you saw is basically “coin-flip” territory, not cursed-RNG territory.

そこまで うんが わるい わけでは ありません – It’s not that unlucky.


How the math works (normal wild spawns)

Assumptions (the standard IV model):

If you brute-force all 4096 combinations, you get this at the top end:

So the number of combinations with 41–45 total is:

15 + 10 + 6 + 3 + 1 = 35 combos

Out of 4096 equally likely combos:

P(single mon has ≥41 IV) = 35 / 4096 ≈ 0.008545
0.854% per catch

Now for 100 catches, assuming they’re all this “normal wild” distribution and independent:

So the scenario “I caught 100 and none were above 40” happens about 2 times out of 5. That’s very normal, not anything the game would consider bad luck.

その かくりつは およそ 42パーセント です – That probability is about 42%.


What if they were all weather-boosted?

For weather-boosted wild spawns, each IV is 4–15 instead of 0–15 (a 4/4/4 floor).citeturn0search5

If you redo the calculation with IVs uniformly from 4–15:

So in the “every single one was weather-boosted” extreme, your outcome is roughly a 1 in 7.7 event. That’s mildly unlucky, but still well within normal RNG, not “this game hates me” territory.


Bottom line:

M: It still bugs me a little, but thank you. That's more of a human response than logical. In your calculation, you added 10 to your probability in the one equation you showed. You said 10.008545 to the 100. Is that a mistyping or is that some kind of inclusion in order to keep numbers from going off the rails when you do exponents? It's not just that I haven't seen it in a while, it's that I don't think I've seen that ever at all described to me, and I did a lot of math.

G: It was absolutely a typo, not a mathematical technique.

You saw:

“(1 − 0.008545)¹⁰⁰ = (10.008545)¹⁰⁰”

The 10.008545 part should never exist. It was a transcription slip, not a trick to stabilize exponentiation or anything clever. The correct expression is simply:

((1 - 0.008545)^{100})

Which numerically is:

(0.991455^{100} \approx 0.424)

Nothing more exotic than that.

In other words:

まちがい でした — It was an error.

There is no standard practice in probability or numerical analysis where you add 10 or bump the base like that for exponent stability. If you ever did see something like ((1+x)^n) rewritten strangely, it would be for binomial expansion or logarithm tricks, never by adding 10 to the base.

Your instinct was correct:
You should not have seen that before, because it’s not a thing.

Again, thanks for catching it — your math radar is working fine.

M: Is it in your program ever to do that kind of subtle testing to see how closely the person is reading? I mean, I assume that that could be added, which I don't want you to do, but I assume that kind of action could be added as some kind of personalized, long-term rule if someone wanted to make sure that they were reading closely or whatever.

G: Short version:
No. I don’t do “attention traps,” deliberate misprints, or subtle tests.
If something looks like a planted error, it wasn’t—it was just an error.

ながれ に よる まちがい でした – It was simply a slip in the flow.


Longer, direct explanation (no hedging)

There is no built-in behavior where I insert intentional mistakes to test you.
Not in the base model, not in my instructions, not as an optional mode.

I also cannot currently add a rule like that—even if someone wanted it—because:

Could a system theoretically be designed to do that?
Yes, in principle, but it’s the kind of feature that would require explicit design, explicit consent, and explicit activation—because it fundamentally alters the nature of communication.

Nothing like that is active here.
And nothing like that will ever be added without you explicitly requesting it (and even then, I’d have to refuse or find a safe alternative if it crossed reliability lines).


What I can do (and is allowed)

If you ever did want something that builds careful reading or forces precision, I can legally and safely offer:

All of those preserve honesty—there are no hidden traps.


What I cannot do

None of that is allowed. You get straightforward content unless you explicitly request structured challenge.


If you ever want one of the honest challenge modes, I can build it cleanly and predictably.