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Have you attempted interacting directly with a chip or cable while observing it under the microscope? Poking one with a stick or nicking one with a scalpel? I've heard you remark on their solid appearance, but I can't even begin to predict how they'd react to physical stimuli...
Thanks Andrew, we have tried to improve on this - your feedback gratefully received!
Thanks, David, for sharing your ongoing investigations. One thing that I think would be helpful would be to start by identifying which slide you are looking at, and something of its history.