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| {{merge|OCA|very closely-related concepts}}
| | #REDIRECT [[OCA]] |
| {{Glossary}}
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| '''Alien''', in the context of [[Conway's Game of Life]], denotes concepts not related (i.e. alien) to Conway Life. The term is primarily applied to rules ([[cellular automata]]) and [[pattern]]s. An '''alien rule''' is any [[cellular automaton]] other than Conway Life itself; an '''alien pattern''' or '''alien object''' (sometimes shortened to "an '''alien'''") is a pattern or object not existing, or behaving differently, in Conway Life.
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| == Examples ==
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| [[Day & Night]] (B3678/S34678) is an alien rule; the fireball, a [[period]]-40 [[spaceship]] in Day & Night, is an alien spaceship:
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| {{EmbedViewer
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| |pname = dayandnightfireball
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| |viewerconfig = #C [[ AUTOSTART TRACKLOOP 40 0 1/2 GPS 20 THUMBSIZE 2 ZOOM 8 WIDTH 480 HEIGHT 480 ]]
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| |position = center
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| }}
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