Should students be trained to question unsafe instructions in laboratories or workplaces?

Yes. In laboratories and workplaces, students should learn that they may question an instruction when they have a safety concern: they should check the procedure, hazards, and required protective equipment, and pause the work to ask, consult, or report. This does not mean continuing a dangerous activity independently or simply refusing an instruction; it also involves raising the concern respectfully with a supervisor or safety officer and following established emergency procedures. Training and reporting routes vary by university, course, and workplace, so the official information should be checked.