olog engine is already initialised,
 and if so, with what arguments.</li>
 </ol>
 The Prolog engine must be* initialized before any queries are made, but
 this will happen automatically (upon the first call to a Prolog FLI routine)
 if it has not already been done explicitly.

 <hr>
 Copyright (C) 2004 Paul Singleton
 <p>
 Copyright (C) 1998 Fred Dushin
 <p>
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

 <ol>