[@Leos Klien]

What Genni said. There isn't any direct way of determining whether or not a human is a human or Gen-3 Synth. While any Gen-2 (aka metal men) are easily able to be seen and loyal to the Institute to a fault.

I'd like you to edit the part about accepting synths - since its confirmed in Fallout 4 lore, there isn't any way to detect them from regular humans - plus I would like to know how the synth attack affected you.