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PaperclipPerfector  19hr ago (text post)   823 thread views

Friday Fun Thread for March 27, 2026

Be advised: this thread is not for serious in-depth discussion of weighty topics (we have a link for that), this thread is not for anything Culture War related. This thread is for Fun. You got jokes? Share 'em. You got silly questions? Ask 'em.

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One Billion Jews

Recently, Gad Saad was on the Joe Rogan Experience and he asked the host how many Jews he thought there were. Rogan responded one billion, or 500 million minimum, conservative estimate. There are in fact about 20 million Jews. Rogan was off by a factor of 25.

Ha ha. But to be fair if you're not used to doing Fermi estimates you can get tripped up like this.

I asked Claude to challenge me on some that I might be similarly dumb about but I've spent enough time in this kind of community that all of the low hanging fruit, like murder rate in the US or percentage of federal budget that goes to foreign aid has been picked.

The ones that busted me hardest were estimating the age of Proto Indo European (less than 10,000 years old, I guessed 100k) and the number of spoken languages in the world (about 7000, I guessed 1000). I guess I don't feel too embarrassed about not knowing those. And I still wasn't 25x off.

I ask you, fellow Mottizens, do you have facts that we should all know that would probably punk us if we tried to estimate? Tip: you can make something a spoiler by surrounding it with two | characters on each side (check the preview).

That's borderline braindead from Rogan. It's like a child's thoughtless, blurted out estimate.

On the other end of that topic's estimates, you had the Palestininans in a Gaza survey, most of whom were convinced that only 0.5 million Jews lived in Israel. Their ignorance may have played a part in their constant willingness to use violence against Israel. It also may have some root in what may be universal breeding grounds for genocidal thought (my own speculation): "they're super dangerous and evil, but they're super small at the same time, so we should just squash them!"

My q: How many professional, actively managed funds beat their benchmark index over the course of 15-20 years? Guess at a percentage/range.

About 1% if even that, I believe.

1 billion Jews is ridiculous, though, it'd be one in eight humans on earth. Perhaps in certain parts of America it feels that way - Rogan likely has disproportional contact with intelligent, unusual people and maybe that skews his estimates. But Israel would have to be the size of China.

About 1% if even that, I believe.

I think you have over-corrected here. It's more like 5-15% before fees and 5-10% after fees. They (professional investors and fund managers) are largely, in Peter Lynch's words, 'oxymorons', but it's not quite as bad as you suspected. Funnily or appropriately enough, the percentage lines up almost exactly with the percentage of amateur traders who succeed consistently. Yet so-called professionals and those with credentials are consistently awarded more credibility and respect.

That isn’t quite true. “Amateur investors” includes everything from sensible people who manage their 401ks with a little panache and a slight preference in sector exposure to “day traders” of the WSB type who gamble on far out of the money options or who put their life savings into heavily leveraged short ETFs.

Among the latter, most data shows perhaps 1% make money consistently, far below professional active managers. In addition, their losses are far higher, while many active managers (loathe as I am to defend them) only marginally underperform the market.

I did not say amateur investors (the larger group). I said amateur traders, who attempt to take their activities quite seriously. Around 10% of them succeed consistently, afaik.

What separates a trader from an investor? You can discuss this professionally (traders execute to balance liquidity, market depth, optimize, PMs strategize, order etc), but its not relevant to amateur investing where the PM/trader distinction is definitionally irrelevant.

Rogan is a stand up comedian, 1/8 professional comedians are probably Jewish.

Best explanation!

In New York City, I think about a quarter of white people are Jewish. In LA it is much lower, though maybe 1/8th still makes sense.

YouGov says (link above) Americans think 30% of US people are Jewish. In reality, about 10% of New Yorkers and about 2% of Americans are Jewish (which would make it about 20% of whites in NY, though there are non-white Jews, but not too many of them in New York I presume). And this likely including people who have any Jewish genes, about half of them probably do not have any connection to Jewish culture or religion - though in New York due to large Orthodox population likely the distribution is a bit different.

That said, for comedians specifically I'd say 1/8 is probably low, could be as high as 20% if you count successful professional comedians, though I haven't seen any exact or well-supported figures anywhere.

Fair.

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