“This sentence is false” is an example of a logical inconsistency known as the liar paradox. If this sentence is true, then it is indeed false. But if this sentence is false, then it must be true.

An artificial-intelligence bot can now pass 99.8% of attention-check questions in surveys (see Nature 650, 17; 2026). But this needn’t be a threat: these checks were invented to catch careless human ...

Inflation pressures facing U.S. services firms were the greatest in four years last month as the war in Iran pushed up energy prices, a survey of managers found. Businesses expected the prices they ...

Social media continues to be used by scammers for a growing number of rip-offs – especially for ads claiming super discounts for merchandise if you respond to a survey. Sign up for our Newsletters ...