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...laced by modern formal logic, which has its roots in the work of late 19th-century mathematicians such as [[Gottlob Frege]]. Today, the most commonly used sys ...order logic.png|thumb|upright=1.6|alt=Visualization of how to translate an English sentence into first-order logic|Formal logic needs to translate natural lan ...

{{Use American English|date=November 2022}} ...the human population will begin to decline in the second half of the 21st century.<ref>{{Cite news |last1=Cave |first1=Damien |last2=Bubola |first2=Emma |las ...

{{Use British English|date=June 2017}} ==Recorded history before 12th century== ...