Pink elephant - while I appreciate your opinion, and respect your right to vote as you see fit. Your assumed technical understanding of what it would take to enable this seems to be out of sync (see what I did there??) with modern implementations of this kind of feature. If you're vetoing it because of the technical roadblocks you imagine existing then I'd recommend you read up on technologies like elastisearch. Elastisearch could easily work with the URL, it could even work on the entire page content to catch deltas. But, let's be clear I'm not looking to solution this for Evernote. Only they know the context with which they make business decisions. And all I wanted to do was raise a suggestion to them for consideration.
To restate my request - I'd like to know if I'm clipped a page so that I can clip indiscriminately. This behaviour enables me to use Evernote as my backup brain, creating vast maps of related content for future processing. The benefits to Evernote are that the more I do this the harder it is for me to leave their product and as a result the lifetime value of me as a customer goes up. Being able to use their product as a 2nd brain also opens up future possibilities to add more value to their platform.
Your community scoring indicates you spend a lot more time here than I do, which is nice. I'm not interested in getting in to a sword fight with you about a problem I'd be interested in EN addressing in some way.