Wouldn't it be nice to have two more methods true? and false? like nil?
in Object.

n = NilClass.new
t = TrueClass.new
f = FalseClass.new

n.nil? -> true
t.nil? -> false
f.nil? -> false

n.true? -> false
t.true? -> true
f.true? -> false

n.false -> false
t.false -> false
f.false -> true


Thanks,
Mohammad