I doubt it is a engineer / scientist thing. Dijkstra was way much more of an engineer-programmer than many would realize. He was an engineer first and the rest

I doubt it is a engineer / scientist thing. Dijkstra was way much more of an engineer-programmer than many would realize. He was an engineer first and the rest later. I think it is about correctness of claims. There are engineers who are cognizant of the deficiencies of testing, and those that believe that testing is truly sufficient and complete.