The Simplest
Explanation
You leave a glass of milk on the table. When you come back, the glass is empty, there are white drops on the floor, and the cat is licking its whiskers. Your little brother says a ghost drank it.
Which explanation do you choose, and why?
💡 The Idea
Both explanations would explain the empty glass. But the ghost explanation needs lots of new things to be true: that ghosts exist, that they drink milk, and that they spill it. The cat explanation needs only things we already know: cats exist, and cats love milk.
About 700 years ago, an English thinker called William of Ockham taught that we shouldn’t pile up more assumptions than we need. This idea is called Ockham’s razor (often spelled Occam’s razor), because it “shaves away” the unnecessary parts of an explanation.
A trick, or a miracle?
In 1748, the Scottish philosopher David Hume asked a sharp question about miracles: which is more likely, that the laws of nature were broken, or that someone was mistaken or playing a trick? Mistakes and tricks happen every day. So before believing that nature’s laws were broken, we should be sure that no mistake or trick could explain what happened.
Careful, though: the simplest explanation isn’t always right. It’s the best place to start. Then you test it.
When it’s a trick or a miracle,
check for the trick first.
🔗 Where You’ve Seen It
- Activity 5: The Magic Banana
A banana sliced inside by a jinn, or a toothpick pushed in along the edge of the peel? The toothpick needs nothing new, and it leaves tiny holes. - Activity 3: Ramar’s Herbal Petrol
Leaves turning into petrol, or petrol hidden in a hollow stirrer? Only one of these breaks the laws of chemistry. - Activity 1: The Balloon That Won’t Burst
A mind that protects balloons, or a piece of tape? Tape is cheaper than a miracle. - Activity 4: The 1995 Milk Miracle
A statue that drinks, or milk running down its front? A little colour settled the question. - Activity 9: The Idol That Rose From the Earth
An idol rising by divine power, or soaked seeds swelling underneath it? Only one of these needs nothing new.
🌍 Use It Everywhere
Doctors have a saying: “When you hear hoofbeats, think of horses, not zebras.” In India we might say: think of cows, not unicorns! When your phone stops charging, check the cable before you think of a curse. When you hear a strange noise at night, think of the wind, a cat or a neighbour before you think of a ghost.
For each mystery, think of a simple explanation and an extraordinary one. Then think of a test to decide between them.
- A photo taken in a dark room shows a glowing white ball floating in the air.
- A “holy” tree drips water from its bark.
- Your phone screen lights up by itself.
Show the answer
- Simple: the camera flash lit up a speck of dust close to the lens. Test: take more photos with the flash, in a dusty room and a clean one.
- Simple: sap, or rainwater stored in the tree, or water from leaks or watering nearby. Test: watch where the water comes from, and whether it stops in dry weather.
- Simple: a message or notification arrived. Test: check the notifications!
For parents and teachers
- Ockham’s razor: named after William of Ockham (born about 1285, died about 1348), an English Franciscan friar and philosopher. See “Occam’s razor” (Encyclopaedia Britannica).
- Hume’s argument comes from the essay “Of Miracles” in An Enquiry Concerning Human Understanding (1748). The version here is simplified for children.
- A caution worth teaching: “simplest” means fewest new assumptions, not “easiest to believe”. The simplest explanation is a starting point to be tested, not a final answer.
A Young Skeptics thinking tool, written with the assistance of AI tools, and reviewed by our editors. — CHARVAKA DESK