41. The author of this article warns that stronger laws are needed to protect new kinds of home security systems from being copied and sold by imitators in order to prevent an eventual loss of manufacturing jobs within the industry. This conclusion is based on the following chain of reasoning: With the protection of stronger laws, manufacturers will naturallyinvest in the development of new home security products and production technologies, whereas without such protection, manufacturers will cut back on investment. If manufacturers cut back on investment, then a decline in product quality and marketability, as well as in production efficiency, will result. This, in turn, will cause the predicted loss of industry jobs. This line of reasoning is unconvincing for several reasons.来源：考试大
To begin with, the author assumes that existing copyright, patent and trade secret laws are inadequate to protect home security system design. But the author never explains why these laws don t offer sufficient protection, nor does he offer any evidence to show that this is the case.来源：考试大
Secondly, the argument depends on the twin assumptions that stronger legal protection will encourage manufacturers to invest in home security-system production, while the absence of strong legal protection will have the opposite effect. The author fails to provide any evidence or reasons for accepting these assumptions about cause-and-effect connections between the law and what happens in the marketplace.来源：考试大
Moreover, both of these assumptions can be challenged. It is possible that stronger protections would not greatly affect industry investment or jobs overall, but would instead help to determine which companies invested heavily and, therefore, provided the jobs. For instance, a less-restricted market might foster investment and competition among smaller companies, whereas stronger legal protections might encourage market domination by fewer, larger companies.来源：考试大
In conclusion, I do not find this argument compelling. The author must provide evidence that home security system designs are not being adequately, protected by current patent, copyright or trade secret laws. The author must also provide an argument for the assumptions that stronger laws will create more industry jobs overall, while the absence of stronger laws will result in fewer industry jobs.