A knife having a handle into which a knife blade may be inserted. The system generates a composite simulation dataset that displays the trajectory path in a virtual reality-like interactive display. Preferably, the antagonist is administered repeatedly over time by subcutaneous injection. A hydration reaction between the water in the azeotropic mixture and an added olefin, under selected mild conditions, and using a selected catalyst, produces a product including a second alcohol corresponding to the olefin, and the first alcohol, in substantially anhydrous form. An unwanted electromagnetic field generated by current in the end conductor is compensated for by an electromagnetic field generated by the current in the further end conductor. The cover is movable to an open configuration and a closed configuration.