Function	Description
null	A null value. To export as null in JSON or ~ in YAML
true	Constant logical true
false	Constant logical false
if	If c is true, return t else f
then(t, f, c)	For pipeline if: - x? then(t, f)
when(p?, f, x)	When x satisfies p? apply f else pass through unchanged

Function	Description
panic	Raise runtime error with message string s
assert(p?, s, v)	If v p? is true then return v otherwise error with message s. Composable in pipelines: x assert(non-nil?, "expected non-nil")

Function	Description
not	Toggle boolean
(! b)	Not x, toggle boolean
(¬ b)	Not x, toggle boolean
and	True if and only if l and r are true
or	True if and only if l or r is true