Case File #0088
Sep 17, 2026 — 10 rounds, declassified. The fabrication in each is marked; the truth of all three follows. Play today's case →
- Round 1 SCIENCE
- ✗ FABRICATION
As iron rusts, it slowly loses weight because the metal flakes away into lighter oxide dust.
FALSE. Rusting adds oxygen from the air, so a rusted piece of iron actually weighs more than before.
- ✓ TRUE
Stainless steel resists rust because its chromium forms an invisible, self-repairing oxide layer on the surface.
TRUE. That thin chromium-oxide film reforms when scratched, keeping the steel protected.
- ✓ TRUE
Gold is so chemically unreactive that it barely tarnishes, which is why ancient gold artifacts still gleam.
TRUE. Gold resists reacting with oxygen and most acids, so it keeps its shine for millennia.
- ✗ FABRICATION
- Round 2 HISTORY
- ✓ TRUE
Christopher Columbus completed his first transatlantic crossing in 1492, reaching islands in the Caribbean.
TRUE — he made landfall in the Bahamas that October, opening sustained European contact with the Americas.
- ✗ FABRICATION
Columbus mainly sailed west to prove the Earth was round, a fact nearly all educated Europeans of his day denied.
FALSE — educated Europeans already knew the Earth was round; the real dispute was how far away Asia was.
- ✓ TRUE
Columbus believed to the end that he had reached the outskirts of Asia rather than a new continent.
TRUE — he insisted he had found a route to the Indies, not an unknown landmass.
- ✓ TRUE
- Round 3 FOOD
- ✓ TRUE
There is evidence of pasta-like foods in Italy before Marco Polo's travels, undercutting the story that he introduced it.
TRUE. Records show pasta in Italy predating Marco Polo, so he could not have brought the first noodles home.
- ✓ TRUE
Dried durum-wheat pasta was being produced in medieval Sicily, helping it spread around the Mediterranean.
TRUE. Medieval Sicily was an early hub of dried pasta production, aiding trade and its wider spread.
- ✗ FABRICATION
Marco Polo brought the first noodles to Italy from China, which is why Italians began making pasta.
FALSE. This is a popular myth; pasta already existed in Italy before Marco Polo's journey to Asia.
- ✓ TRUE
- Round 4 ANIMALS
- ✗ FABRICATION
Dolphins are fish and breathe underwater through gills, like other marine animals.
FALSE. Dolphins are air-breathing mammals that must surface to breathe through a blowhole, not gills.
- ✓ TRUE
A dolphin sleeps with one half of its brain at a time, keeping one eye open and surfacing to breathe.
TRUE. This 'unihemispheric' sleep lets it rest while staying alert enough to surface for air.
- ✓ TRUE
Dolphins use signature whistles that act like individual names, identifying themselves and calling to specific others.
TRUE. Each dolphin develops a personal whistle others use to address it.
- ✗ FABRICATION
- Round 5 ANIMALS
- ✓ TRUE
A kangaroo is a marsupial whose newborn is born tiny and hairless, then finishes growing inside the mother's pouch.
TRUE. The joey is roughly bean-sized at birth and crawls to the pouch to develop further.
- ✗ FABRICATION
A kangaroo's tail is a simple, muscle-free counterweight used only for balance while standing still.
FALSE. The tail is heavily muscled and acts like a fifth limb, pushing the body forward while the kangaroo walks slowly.
- ✓ TRUE
A kangaroo cannot move its hind legs independently on land, so it is unable to hop or walk backwards.
TRUE. Its large tail and the way its legs work together make backward motion effectively impossible.
- ✓ TRUE
- Round 6 LANGUAGE
- ✗ FABRICATION
The word 'gospel' comes from an Old English term meaning 'God's spell', that is, a divine incantation or magic saying.
FALSE. It comes from Old English 'godspel' meaning 'good news' (god 'good' + spel 'story'), a translation of the Greek for good tidings, not 'God's spell'.
- ✓ TRUE
The word 'clue' comes from 'clew', meaning a ball of thread, echoing the thread a hero unwound to find his way out of a labyrinth.
TRUE. Following a thread to solve a maze gave 'clew/clue' its sense of something that guides you to a solution.
- ✓ TRUE
The word 'malaria' comes from an Italian phrase meaning 'bad air', from the belief that the disease rose from foul marsh vapours.
TRUE. Before mosquitoes were understood, people blamed swampy 'bad air' for the fever.
- ✗ FABRICATION
- Round 7 SCIENCE
- ✗ FABRICATION
Sugar dissolves faster in cold water than hot, because cold water molecules grip the sugar more tightly.
FALSE. Sugar dissolves faster in hot water; the added heat gives molecules more energy to break the sugar apart.
- ✓ TRUE
Stirring a solution speeds up dissolving by bringing fresh solvent into contact with the solid.
TRUE. Stirring sweeps away saturated liquid at the surface, letting more solid dissolve.
- ✓ TRUE
Carbonated drinks fizz more when warm, because gases dissolve less easily in liquids at higher temperatures.
TRUE. Warmth drives dissolved carbon dioxide out of solution, so warm soda foams more.
- ✗ FABRICATION
- Round 8 FOOD
- ✓ TRUE
The Caesar salad is generally credited to a restaurateur working in Tijuana, Mexico, in the 1920s.
TRUE. The dish is widely traced to a Tijuana restaurant kitchen in the 1920s, near the U.S. border.
- ✓ TRUE
The classic dressing is built from ingredients such as garlic, lemon, egg, and Parmesan cheese.
TRUE. Emulsified egg, lemon, garlic, oil, and Parmesan form the backbone of the traditional dressing.
- ✗ FABRICATION
The Caesar salad was named after the Roman emperor Julius Caesar, whose banquets featured an early version of it.
FALSE. It is named for restaurateur Caesar Cardini, not the Roman emperor, and dates to the 20th century.
- ✓ TRUE
- Round 9 FOOD
- ✓ TRUE
The Maillard reaction is a reaction between amino acids and reducing sugars that produces browning and new flavors.
TRUE. This heat-driven reaction creates the savory flavors and brown color of roasted, seared, and baked foods.
- ✓ TRUE
Caramelization involves the breakdown of sugars alone and generally begins at higher temperatures than many Maillard reactions.
TRUE. Caramelization is pure sugar breakdown and typically needs higher heat than protein-plus-sugar browning.
- ✗ FABRICATION
The browning of a seared steak is caused mainly by caramelization of the meat's own natural sugars.
FALSE. Meat browning is mostly the Maillard reaction between amino acids and sugars; caramelization is a separate sugar-only process.
- ✓ TRUE
- Round 10 FOOD
- ✓ TRUE
The potato was domesticated in the Andes region of South America thousands of years ago.
TRUE. Andean peoples domesticated the potato millennia ago, developing many varieties suited to high altitudes.
- ✓ TRUE
Potatoes reached Europe in the 16th century and were initially met with suspicion in some regions.
TRUE. After arriving from the Americas, potatoes were long distrusted in parts of Europe before becoming a staple.
- ✗ FABRICATION
Sweet potatoes and regular potatoes are closely related and belong to the very same plant family.
FALSE. They are not close relatives: the potato is a nightshade, while the sweet potato is in the morning-glory family.
- ✓ TRUE