If only magnesium were less expensive. According to researchers at the Pacific Northwest National Laboratory (PNNL), based in Washington State, USA, the magnesium used in the production of lightweight alloys for cars and aeroplanes is seven times more costly than the steel employed in the same applications.ccording to researchers at the Pacific Northwest National Laboratory (PNNL), based in Washington State, USA, the magnesium used in the production of lightweight alloys for cars and aeroplanes is seven times more costly than the steel employed in the same applications.
Definition of polemic for English Language Learners. : 1  a strong written or spoken attack against someone else's opinions, beliefs, practices, etc. 2  polemics : the art or practice of using language to defend or harshly criticize something or someone.
Dialectic or dialectics (Greek: Î´Î¹Î±Î»ÎµÎºÏÎ¹ÎºÎ®, dialektiká¸), also known as the dialectical method, is a discourse between two or more people holding different points of view about a subject but wishing to establish the truth through reasoned arguments. The term dialectic is not synonymous with the term debate. While in theory debaters are not necessarily emotionally invested in their point of view, in practice debaters frequently display an emotional commitment that may cloud rational judgment.