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=item answer( VALUE )

This method take VALUE to be the value of the goal attribute and will use it to interpolate and return the MESSAGE that was given 
when the object was constructed.

=back

=head2 Private methods

None

=head1 ENVIRONMENT

None

=head1 DIAGNOSTICS

=over 4

=item Goal->new() takes 2 arguments

When the constructor is initialised it requires two arguments. This message is given if more or less arguments were supplied.

=item Goal->new() argument 1 (NAME) is undefined

The correct number of arguments were supplied to the constructor, however the first argument, NAME, was undefined.

=item Goal->new() argument 2 (MESSAGE) is undefined

The correct number of arguments were supplied to the constructor, however the second argument, MESSAGE, was undefined.

=item Goal->is_goal() takes 1 argument

When the method is called it requires one argument. This message is given if more or less arguments were supplied.

=item Goal->is_goal() argument 1 (NAME) is undefined

The correct number of arguments were supplied with the method call, however the first argument, NAME, was undefined.

=item Goal->name() takes no arguments

When the method is called it takes no arguments. This message is given if some were supplied.

=item Goal->answer() takes 1 argument

When the method is called it requires one argument. This message is given if more or less arguments were supplied.

=item Goal->answer() argument 1 (VALUE) is undefined

The correct number of arguments were supplied with the method call, however the first argument, VALUE, was undefined.

=back

=head1 BUGS

None to date

=head1 FILES

See Goal.t in the test directory

=head1 SEE ALSO

AI::ExpertSystem::Simple - The base class for the expert system shell

AI::ExpertSystem::Simple::Knowledge - A utility class

AI::ExpertSystem::Simple::Rules - A utility class

=head1 AUTHORS

Peter Hickman (peterhi@ntlworld.com)

=head1 COPYRIGHT

Copyright (c) 2003, Peter Hickman. All rights reserved.

This module is free software. It may be used, redistributed and/or 
modified under the same terms as Perl itself.