Sufficient Reason, Theoretical Reason, Technical Reason

As has been previously discussed, the product of Descartes' Truth-seeking Method actually contains several concepts of Truth, and, correspondingly, several methods.  But, there is one method of establishing Truth that is perhaps more immediate and more successful than any of those--when Method itself produces an existence.  An example of Method producing an existence is right in front of Descartes--the work entitled the Discourse on the Method.  Likewise, while the Principle of Sufficient Reason is generally applied to given existents, there is little consideration given to the sufficiency of its own productivity, e. g. any work on just that topic.  In such a case, sufficient reason is a condition of production, not product.  In other words, there is a generally unrecognized distinction between Principle of Sufficient Theoretical Reason, and Principle of Sufficient Technical Reason.  Kant might have recognized his Principle of Pure Practical Reason as a case of the latter, i. e. as a principle for the production of rational behavior, but like Descartes, he gets sidetracked by Theological commitments.