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In the above passage, Peirce introduces the term ''ampheck'' for the 2-place logical connective or the binary logical operator that is currently called the ''joint denial'' in logic, the NNOR operator in computer science, or indicated by means of phrases like "neither-nor" or "both not" in ordinary language. For this operation he employs a symbol that the typographer most likely set by inverting the zodiac symbol for Aries ('''♈'''), but set in the text above by means of the ''curly wedge'' symbol.
In the above passage, Peirce introduces the term ''ampheck'' for the 2-place logical connective or the binary logical operator that is currently called the ''joint denial'' in logic, the NNOR operator in computer science, or indicated by means of phrases like "neither-nor" or "both not" in ordinary language. For this operation he employs a symbol that the typographer most likely set by inverting the zodiac symbol for Aries('''♈'''), but set in the text above by means of the ''curly wedge'' symbol.
In the same paper, Peirce introduces a symbol for the logically dual operator. This was rendered by the editors of his ''Collected Papers'' as an inverted Aries symbol with a bar or a serif at the top, in this way denoting the connective or logical operator that is currently called the ''alternative denial'' in logic, the NAND operator in computer science, or invoked by means of phrases like "not-and" or "not both" in ordinary language. It is not clear whether it was Peirce himself or later writers who initiated the practice, but on account of their dual relationship it became common to refer to these two operators in the plural, as the ''amphecks''.
In the same paper, Peirce introduces a symbol for the logically dual operator. This was rendered by the editors of his ''Collected Papers'' as an inverted Aries symbol with a bar or a serif at the top, in this way denoting the connective or logical operator that is currently called the ''alternative denial'' in logic, the NAND operator in computer science, or invoked by means of phrases like "not-and" or "not both" in ordinary language. It is not clear whether it was Peirce himself or later writers who initiated the practice, but on account of their dual relationship it became common to refer to these two operators in the plural, as the ''amphecks''.
===Focal nodes===
===Focal nodes===
* [[Inquiry Live]]
* [[Inquiry Live]]
* [[Logic Live]]
* [[Logic Live]]
===Peer nodes===
===Peer nodes===
* [http://intersci.ss.uci.edu/wiki/index.php/Ampheck Ampheck @ InterSciWiki]
* [http://intersci.ss.uci.edu/wiki/index.php/Ampheck Ampheck @ InterSciWiki]
* [http://mywikibiz.com/Ampheck Ampheck @ MyWikiBiz]
* [http://mywikibiz.com/Ampheck Ampheck @ MyWikiBiz]
* [http://ref.subwiki.org/wiki/Ampheck Ampheck @ Subject Wikis]
* [http://en.wikiversity.org/wiki/Ampheck Ampheck @ Wikiversity]
* [http://beta.wikiversity.org/wiki/Ampheck Ampheck @ Wikiversity Beta]
* [http://beta.wikiversity.org/wiki/Ampheck Ampheck @ Wikiversity Beta]
===Logical operators===
===Logical operators===
* [http://intersci.ss.uci.edu/wiki/index.php/Differential_Logic_and_Dynamic_Systems_2.0 Differential Logic and Dynamic Systems]
* [http://intersci.ss.uci.edu/wiki/index.php/Differential_Logic_and_Dynamic_Systems_2.0 Differential Logic and Dynamic Systems]
{{col-break}}
{{col-break}}
* [http://intersci.ss.uci.edu/wiki/index.php/Prospects_for_Inquiry_Driven_Systems Prospects for Inquiry Driven Systems]
* [http://intersci.ss.uci.edu/wiki/index.php/Introduction_to_Inquiry_Driven_Systems Introduction to Inquiry Driven Systems]
* [http://intersci.ss.uci.edu/wiki/index.php/Introduction_to_Inquiry_Driven_Systems Introduction to Inquiry Driven Systems]
* [http://intersci.ss.uci.edu/wiki/index.php/Inquiry_Driven_Systems Inquiry Driven Systems : Inquiry Into Inquiry]
* [http://intersci.ss.uci.edu/wiki/index.php/Inquiry_Driven_Systems Inquiry Driven Systems : Inquiry Into Inquiry]
{{col-end}}
{{col-end}}
Portions of the above article were adapted from the following sources under the [[GNU Free Documentation License]], under other applicable licenses, or by permission of the copyright holders.
Portions of the above article were adapted from the following sources under the [[GNU Free Documentation License]], under other applicable licenses, or by permission of the copyright holders.
* [http://intersci.ss.uci.edu/wiki/index.php/Ampheck Ampheck], [http://intersci.ss.uci.edu/ InterSciWiki]
* [http://mywikibiz.com/Ampheck Ampheck], [http://mywikibiz.com/ MyWikiBiz]
* [http://mywikibiz.com/Ampheck Ampheck], [http://mywikibiz.com/ MyWikiBiz]
* [http://planetmath.org/Ampheck Ampheck], [http://planetmath.org/ PlanetMath]
* [http://planetmath.org/Ampheck Ampheck], [http://planetmath.org/ PlanetMath]
* [http://wikinfo.org/w/index.php/Ampheck Ampheck], [http://wikinfo.org/w/ Wikinfo]
* [http://en.wikiversity.org/wiki/Ampheck Ampheck], [http://en.wikiversity.org/ Wikiversity]
* [http://beta.wikiversity.org/wiki/Ampheck Ampheck], [http://beta.wikiversity.org/ Wikiversity Beta]
* [http://beta.wikiversity.org/wiki/Ampheck Ampheck], [http://beta.wikiversity.org/ Wikiversity Beta]
* [http://en.wikipedia.org/w/index.php?title=Ampheck&oldid=62218032 Ampheck], [http://en.wikipedia.org/ Wikipedia]
* [http://en.wikipedia.org/w/index.php?title=Ampheck&oldid=62218032 Ampheck], [http://en.wikipedia.org/ Wikipedia]
[[Category:Inquiry]]
[[Category:Inquiry]]
