logical truth

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Iraqi Army Soldiers from the 9th Mechanized Division learning to operate and maintain M1A1 Abrams Main Battle Tanks at Besmaya Combat Training Center, Baghdad, Iraq, 2011. Military training. Iraq war. U.S. Army

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Thanksgiving Turkey with all the sides

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Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017

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Woman tied to a ducking stool, a method of punishment by means of humiliation, beating, or death. (cucking stool)

8 Unusual Punishments Inflicted on Women Throughout History

Mayer Amschel Rothschild (1744-1855), founder of the house of Rothschild; lithograph by Friedrich Lieder, c. 1830.

Where Do Anti-Semitic Conspiracy Theories About the Rothschild Family Come From?

An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.

11 Egyptian Gods and Goddesses

Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that

America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)

logical truth

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epistemological distinctions

$optical illusion: refraction of light$
In epistemology: Logical and factual propositions
…to a proposition expressing a logical truth—e.g., to a proposition such as “If p and q, then p.” The proposition “All husbands are married,” for example, is logically equivalent to the proposition “If something is married and it is male, then it is married.” In contrast, the semantic and syntactic…
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metalogic

In metalogic: Semiotic
…language, presented an exposition of logical truths as sentences that are true in all possible worlds. One may say, for example, “It is raining or it is not raining,” and in every possible world one of the disjuncts is true. On the basis of this observation and certain broader developments…
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In metalogic: Elementary logic
…concepts of logic and of logical truth.
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