All words

reductio ad absurdum

Meaning

A method of reasoning where a premise is shown to be false by demonstrating that it logically leads to an illogical or contradictory conclusion.

Examples by difficulty

Basic: Simple, everyday vocabulary — the easiest to read.

He insisted the earth was flat, but when we asked what happened if you sailed off the edge, he couldn't answer. It was a perfect reductio ad absurdum; his idea led to a crazy, impossible outcome, proving it was wrong.

He insisted the pigeons could solve complex calculus, arguing their cooing was advanced mathematical language. When I pointed out this would mean a flock could build a bridge, a clear and impossible feat, his entire argument collapsed. It was a classic reductio ad absurdum.

"If you think we should stop all research because of one small risk, that's a reductio ad absurdum," Sarah sighed, frustrated. "It's like saying we should never drive because a car *could* crash. That's just a silly, impossible outcome."

He swore the alien fungus was harmless, that it only grew on dust. But when we showed him that if he was right, it would mean the entire moon was made of dust, and therefore a giant fungus, his face fell. That absurd outcome, born from his initial idea, clearly proved he was wrong about the fungus.

Jaxon insisted the sky was green because it was clearly visible. His brother pointed out that if the sky was green, then their neighbor's bright red car would have to be purple, which was obviously wrong. It was a classic reductio ad absurdum; his brother showed Jaxon's idea led to a silly, untrue outcome.

Normal: Standard, everyday language.

He argued that if we allowed even the smallest concession, it would inevitably lead to complete anarchy. His fear was a textbook reductio ad absurdum; he painted a picture of chaos so extreme it was impossible to believe.

He insisted the cat could fly. When I pointed out that meant it could also spontaneously combust on the moon, and then turn into a teapot, his argument collapsed. It was a perfect reductio ad absurdum.

She insisted the quantum entanglement was solely responsible for her misplaced keys, a truly ridiculous notion. Trying to explain the sheer statistical improbability, the way her logic spiraled into a nonsensical mess, felt like a futile reductio ad absurdum.

When Silas argued that the sentient moss in the biodome only needed music to thrive, Elara pointed out that if that were true, then silence would instantly kill it. This reductio ad absurdum showed Silas how silly his music theory really was.

"If we assume you can perfectly replicate the scent of a freshly unearthed tomb," Detective Miller sighed, rubbing his temples, "then by reductio ad absurdum, you're saying you bottled actual grave dust and ancient air. That's impossible, so your premise must be wrong."

Advanced: Richer vocabulary that stretches an upper-level reader.

If you truly believe that saying "I'm not hungry" means you *can't* eat a single bite of this cake, even when it's right in front of you, then we've reached a reductio ad absurdum. That logic is utterly ridiculous; it's impossible for a statement to prohibit a physical reality like this.

He insisted everyone should only eat carrots, a claim I found absurd. I countered, "So, if we only eat carrots, we'll all become incredibly strong and vibrant, never needing any other food?" His argument quickly devolved into a ridiculous fantasy, a clear reductio ad absurdum proving his initial premise was flawed.

He insisted the petrified griffin's feather was the cause of the continental drift. I tried explaining that if his premise were true, the entire seabed would have rearranged itself millennia ago, an obvious impossibility. His argument, a clear reductio ad absurdum, crumbled under the weight of sheer, absurd logic.

Commander Thorne scoffed, "So you propose we ration the anti-gravity lubricant based on a pilot's astrological sign? That's a reductio ad absurdum; if we did that, even the smallest maneuver would send us tumbling through the asteroid field."

He insisted the new interstellar propulsion system could generate infinite energy. His calculations, however, led to a reductio ad absurdum, suggesting that its exhaust would eventually transform the entire galaxy into a single, incredibly dense singularity. The committee balked.

Challenging: Rare, high-register vocabulary for serious word lovers.

If we concede his outlandish claim that the moon is made of cheese, then it logically follows that lunar samples would possess the tang of cheddar, a plainly preposterous notion. This is a clear reductio ad absurdum; his premise, leading to such an illogical conclusion, must therefore be spurious.

If we concede that this ludicrous tax exemption proposal is even remotely viable, then logically, we're forced into a reductio ad absurdum: everyone would demand exemptions, plunging our entire fiscal infrastructure into unmanageable disarray. The sheer preposterousness of the outcome exposes the fundamental flaw in the initial premise.

Elder Thorne scoffed, "If we concede that the aetherial resonance of fungal spores dictates planetary alignment, then we arrive at a reductio ad absurdum where a single puffball could theoretically trigger supernovae." The council members recoiled; his logic, though outrageous, irrefutably exposed their preposterous premise.

Commander Valerius scoffed at the brigadier's outlandish proposal to reroute the entire deuterium plasma conduit through the seismic destabilizer field. "Your argument," Valerius stated flatly, "is a *reductio ad absurdum*. If we follow your logic, we'd effectively be attempting to appease the interdimensional fungal overlords with a sacrifice of hyper-compressed spacetime, which is patently ludicrous."

The magistrate, exasperated, declared the plaintiff's assertion that the subterranean mole colony possessed sentience and demanded reparations for perceived encroachment a clear reductio ad absurdum, the sheer implausibility of their supposed grievances rendering the entire proposition untenable.

Difficulty

Challenging — Rare, high-register words for serious word lovers.

Appears in

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