A particle accelerator is a tool used for conducting science experiments. That they work, for that purpose, is purely a product of engineering.
At issue is not "whether science works". It is, rather, what percentage of published papers in science journals are crap, and advance the field not at all. The people in the best position to know say they are appalled at how many are.
Would they all say 80%+? Obviously not. Do any? Absolutely.