Question

Because germans are the smartest engineers in the world, you should buy a german-made car. this speaker is guilty of using what kind of fallacy in reasoning

Answer 1

this speaker is guilty of using : building on an unproven assumption
Even though the logic kinda makes sense, it is a still an assumption until it proven otherwise. The German's scientist may allocated their resource to research something other than cars (like rockets or weapons) which could make this assumption wrong