17In order to answer that question, it should be noted first that the system of protection introduced by the directive is based on the idea that the consumer is in a weak position vis-à-vis the seller or supplier, as regards both his bargaining power and his level of knowledge (judgments in Aziz, C‑415/11, EU:C:2013:164, paragraph 44, and Sánchez Morcillo and Abril García, C‑169/14, EU:C:2014:2099, paragraph 22).
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