Germans focus on so-called Knackpunkte – literally snap or break points – those areas, which if they fail, all fails. The German yes is often given conditionally or with a warning: “We can do that, assuming that ….”, or “That would be possible, but only if ….”, or “At the moment we cannot give you a 100% guarantee, because ….”. By stating there is inherent risk involved, Germans are sharing the risk with the other party to the agreement.
