DATA STRUCTURE PRIMITIVES
=========================

CONSTRUCTORS
------------

SENTENCE thing1 thing2
SE thing1 thing2
(SENTENCE thing1 thing2 thing3 ...)
(SE thing1 thing2 thing3 ...)

	outputs a list whose members are its inputs, if those inputs are
	not lists, or the members of its inputs, if those inputs are lists.


PREDICATES
----------

NUMBERP thing
NUMBER? thing

	outputs TRUE if the input is a number, FALSE otherwise.



LOGICAL OPERATIONS
==================

AND tf1 tf2
(AND tf1 tf2 tf3 ...)

	outputs TRUE if all inputs are TRUE, otherwise FALSE.  All inputs
	must be TRUE or FALSE.  (Comparison is case-insensitive regardless
	of the value of CASEIGNOREDP.  That is, "true" or "True" or "TRUE"
	are all the same.)

OR tf1 tf2
(OR tf1 tf2 tf3 ...)

	outputs TRUE if any input is TRUE, otherwise FALSE.  All inputs
	must be TRUE or FALSE.  (Comparison is case-insensitive regardless
	of the value of CASEIGNOREDP.  That is, "true" or "True" or "TRUE"
	are all the same.)

NOT tf

	outputs TRUE if the input is FALSE, and vice versa.