Maybe the primary coolant but all the designs i’ve seen so far use water for the secondary coolant / working fluid.

Are there any molten salt reactor designs that do not use water as a coolant?

leaded solder without an extractor fan

• lead does not vaporize at the temps used in soldering.
• lead free solder also needs fume extraction. even more so actually, because it is used at slightly higher temps.
• even with perfect fume extraction, leaded solder can still poison you, because you touch it and then touch your face without washing your hands.
• if you are prone to allergic reactions from solder fumes avoid solder with a rosin core, use synthetic flux instead.

I think you can even draw a defining distinction there because if it is not believed then pseudohalucination would be the better description.