ls:Truth is a class. True statements will be of
rdf:type ls:Truth
TBL
suggests the property truth for a model. To get true
properties of a node we could say $node->arc( type => 'lc:Truth'
)->list or maby, if we doesn't distribute the model truthness,
$node->arc( model => {type => 'lc:Truth' } )->list.
To get the true english name of a thing, we could say
$thing->arc( pred => $name, type => 'lc:Truth' )->obj( lang =>
$english )->value. The preference for true statements will usually be a part of
the context. So we could say
$thing->name( lang => $english )->value instead.
And with a prespecified preference for english versions (in the
context), we could say $thing->name->value.
Not implemented