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# Critical Reasoning: Conclusion Weakening Questions

ToppKleen, a new cleaning material, will soon be released onto the market. The product has a special molecular composition that allows it to clean without the use of water, and with perfect results. ToppKleen will achieve more than satisfactory sales figures because it will be used by consumers to clean every household object.

Which of the following, if true, undermines the explanation for ToppKleen's predicted success?

Incorrect.

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This answer choice neither weakens nor strengthens the explanation for TopKleen's predicted success. The marketing methods of cleaning products companies are entirely beside the point as they do not help us undermine the prediction that TopKleen will be used to clean every household object.

Incorrect.

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This answer choice is completely outside the scope of the argument. There is nothing in the argument about microscopes, or molecular science.

Incorrect.

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This answer choice neither weakens nor strengthens the explanation for TopKleen's predicted success. The fact that cleaning materials are dangerous for children does not mean people don't buy them.

Incorrect.

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This answer choice strengthens the conclusion by confirming its assumption, but you are required to weaken it. The fact Topkleen can clean any material without attacking it gives us another reason to believe that it will be used to clean every object in the house, thereby validating the explanation.

Fantastic work!

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This answer choice attacks the argument's assumption that ToppKleen is capable of cleaning every household object. It does so by stating that household objects are made from different materials and will, therefore, react to cleaning materials in different ways. If some objects react negatively, people will not use ToppKleen to clean them.

To increase sales, some cleaning product companies use celebrities to market their products.
Advancements made in the field of molecular science are partly due to the invention of powerful microscopes.
The specialization of plastics has resulted in household products being produced from a variety of substances, each reacting differently to a certain cleaning material.
Cleaning materials always contain potent chemicals, and should be kept out of the reach of children.
ToppKleen is engineered to attack the dirt alone, making the material of the object being cleaned irrelevant to the cleaning process.