Just speaking as an engineer, not as a entrepreneur-in-training: Saying "it's impossible" to any decent engineer should be like swinging a steak in front of a

Just speaking as an engineer, not as a entrepreneur-in-training: Saying "it's impossible" to any decent engineer should be like swinging a steak in front of a hungry german shepherd. I don't care how old they are. If they shrug and accept the "impossibility" of a technical hurdle without due diligence, those same people will be susceptible to "do it this way, trust me, (I have EXPERIENCE|I'm the ARCHITECT)." Those people should always be able to at least give a modicum of explanation or proof as to what reasoning is in play to make something a good or bad idea.