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Question 2. Critical Reasoning

Architects of today largely lack design skills that were common among architects of preceding centuries. A study conducted by the architecture and design department of a prominent university in Paris randomly chose over 200 large European buildings, both old and contemporary, and analyzed them based on the objective factors generally accepted in the industry for evaluating building construction and design. The study found that very few of the contemporary buildings were as well designed as the average 18^th and 19^th century buildings

Which of the following points to the most serious logical flaw in the argument above?