The Logicals is defined as the Set containing the elements TRUE and FALSE.
Other special sets: 
Complex,
ExtendedReals,
Integers,
Naturals,
NegIntegers,
NegRationals,
NegReals,
PosIntegers,
PosNaturals,
PosRationals,
PosReals,
Rationals,
Reals,
Universal
set6::Set -> Logicals
new()Create a new Logicals object.
Logicals$new()
The Logical set is the set containing TRUE and FALSE.
A new Logicals object.
clone()The objects of this class are cloneable with this method.
Logicals$clone(deep = FALSE)
deepWhether to make a deep clone.
l <- Logicals$new() print(l) #> {TRUE, FALSE} l$contains(list(TRUE, 1, FALSE)) #> [1] TRUE FALSE TRUE