JlSperanza wrote: "I would refer to the attributive/referential. I can say, "I know what a cow is, although I never saw one -- Just hearsay. In other words, I _heard_ what a cow is." Hearing what a cow is is not the same as understanding what a cow is. I presume that Mike could give a reasonable account of what it means for a compressor to short to ground but the mere fact that I heard it doesn't mean that I understood. Understanding requires something more then mere 'hearsay'. Sophistically, Phil Enns Indonesia ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html