Can somebody help me get my feet wet?

What about the Casimir effect, surely that shows that virtual particles are more than a theoretical construct.TTFN,WK

I take it this means you don't know what the Casimir effect is then? It has been raised three times now in this thread and even your direct reply to a post mentioning the Casimir effect totally fails to address whether it shows the existence of virtual particles as a real phenomenon rather than a theoretical construct.The existence of virtual particles doesn't neccessarily mean there is no such thing as cause and effect, but what underlying causes there are to virtual pair formation may reside within the very structure of the universe itself and well below our current ability to resolve.TTFN,WK

Dear Nothingness,I didn't ask you to add to what you already wrote, I asked you to answer whether or not, in your opinion, the Casimir effect shows that virtual particles are not merely theoretical constructs, or indeed to give any indication that you even know what the Casimir effect is. If you don't think the Cassimir effect shows this then why not?TTFN,WK