歪理 Pettifog

反对禁烟的人说：“汽车也污染空气，为什么你们不禁汽车？”
反对禁用塑料袋的人也说：“汽车也污染环境，为什么你们还不禁汽车？”

可是，没人说“汽车不污染”啊！
这些人没看到那么多人在努力倡导公共交通，并为汽车寻找替代能源吗？

Anti Smoking-ban :"Cars are polluting the air, why don't you ban the cars?"
Anti Plastic Bags-Ban also says:"Cars are polluted, why don't you ban the cars?"

The fact is, nobody will say, "Cars are clean to the environment"!
Can't they see people's effort in improving public transport system and looking for new type of energy source for cars?