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From CreationWiki, the encyclopedia of creation science

The Boolean data type can have exactly two values: true or false.

The Boolean type recognizes the following pairs of symbols:

True	False
true	false
t	f
1	0
yes	no
y	n

The specific display of true or false values is controllable in the query syntax. See Help:Semantic search for details.

This type is among the standard datatypes of this wiki.