Fallacies: R

Core idea

The letter R gathers weather lore, gambling logic, a famous reincarnation case and a misdated Round Table. The unifying fault is our hunger for pattern: we want rain to keep a calendar, coins to remember their last flip, and a wooden disc to be older than it is. The cure each time is the same — measure, count, date.

Why it matters

Pattern-seeking is useful machinery; it is also the engine of most superstition. The R-list shows it misfiring in low-stakes ways (St Swithin's Day) and costly ones (the gambler's fallacy that drains casinos). Learning to ask "would this survive an actual count?" is the practical defence, and these entries are a clean training ground for it.

Why these misconceptions persist

The recurring trick is the unrecorded miss. Rain "lore" survives because nobody tallies the days it fails. The gambler remembers the run of heads and forgets the thousands of fair tosses. The "Bridey Murphy" reincarnation case thrilled millions, but few read the sequel that traced every detail to the woman's own childhood. A myth lives in the gap between the hits we notice and the misses we never count.

Key takeaways

Mental model

Copy sourceZoom

Practical application

Count the misses, not just the hits

The Greenwich Observatory killed the St Swithin's myth with a single act: it tallied twenty years of rainfall. Every superstition that "always comes true" has a hidden ledger of failures. Before believing a pattern, ask whether anyone has counted the times it failed.

Remember that chance has no memory

The gambler's fallacy — heads four times, so tails is "due" — feels irresistible because the mind treats randomness as self-correcting. It is not. Each independent event starts fresh. A clumpy, repetitive sequence is what real randomness looks like.

Example

A friend tracks "lucky" numbers on a lottery app and proudly notes the week the app's "hot number" came up. It feels like a system working. Apply the R-list test. The app shows the hits; it does not show the dozens of weeks the hot number missed. And even a perfectly tallied past tells you nothing about the next draw — like the coin, the machine has no memory. A pattern in hindsight is not a prediction.

Related lessons