Editing Conjunction fallacy (section)

{{Short description|Formal fallacy, aka Linda Problem}}{{Distinguish|False conjunction}}
A '''conjunction effect''' or '''Linda problem''' is a [[Cognitive bias|bias]] or [[Logical fallacy|mistake in reasoning]] where adding extra details (an "and" statement or [[logical conjunction]]; [[Mathematical notation|mathematical shorthand]]: <math>\land</math>) to a sentence makes it appear more [[Probability|likely]].<ref name="tk83" /> Logically, this is not possible, because adding more claims can make a true statement false, but cannot make false statements true: If ''A'' is true, then ''<math>A \land B</math>'' might be false (if ''B'' is false). However, if ''A'' is false, then ''<math>A \land B</math>'' will always be false, regardless of what ''B'' is. Therefore, ''<math>A \land B</math>'' cannot be more likely than ''A''.