Re: Oh, please...
In the real world in any STEM field you will various reference sources to solve a problem but that does not prove you understand the reference material. The idea behind testing students is to assess their understanding of the material not how would solve the problem on the job. So any testing strategy will be artificial in the sense that a competent professional will ask for help from others when needed. But to assess an individual competence requires no outside sources; otherwise you are testing a group's competence.