Did you know ... Search Documentation:
Predicate help/1
Availability::- use_module(library(help)).(can be autoloaded)
Source[det]help
[det]help(+What)
Show help for What. What is a term that describes the topics(s) to give help for. Notations for What are:
Atom
This ambiguous form is most commonly used and shows all matching documents. For example: 
?- help(append).
Name / Arity
Give help on predicates with matching Name/Arity. Arity may be unbound.
Name // Arity
Give help on the matching DCG rule (non-terminal)
f(Name/Arity)
Give help on the matching Prolog arithmetic functions.
c(Name)
Give help on the matching C interface function
section(Label)
Show the section from the manual with matching Label.

If an exact match fails this predicates attempts fuzzy matching and, when successful, display the results headed by a warning that the matches are based on fuzzy matching.

If possible, the results are sent through a pager such as the less program. This behaviour is controlled by the Prolog flag help_pager. See section level documentation.

See also
apropos/1 for searching the manual names and summaries.
Tags are associated to your profile if you are logged in
Tags:
LogicalCaptain said (2021-02-27T11:12:11):0 upvotes 0 0 downvotes
Picture of user LogicalCaptain.

This should probably ALSO accept a predicate call as in

help(file_base_name(Base,"/foo/bar/baz.gz")).

Because wrapping "help" around a failed call without editing it further would be a common thing to do.