Julio Ortega Villalobos notes that during the time Ferrater Mora was in Chile, he was in charge of the logic curriculum at the University of Chile and that, "His contribution was decisive in the development and knowledge of formal logic." Julio Ortega also refers to Manuel Atria Ramírez, who asserted that Ferrater was a pioneer in introducing symbolic logic in Chile. Before the introduction of mathematical logic, students primarily studied Aristotelian logic. ("José Ferrater Mora en Chile: filosofía y exilio," Edición electrónica: El Basilisco [España] 21, [1996])

On the jacket, Francisco Romero notes that, "Qué es la lógica is not limited merely to the explanation of the elements of logic in a clear and simple form. This book also raises the problem of the nature of logic and treats the question of the relation between logic and reality." Romero also asserts that the discussion of the question of the relation between logic and reality in ¿Qué es la lógica, "can be seen as an original contribution to a very controversial metaphysical theme." (inside cover, ¿Qué es la lógica?)

Jesús Mosterín has said, "I read Lógica matemática . . . when I was 17 years old. It was the first book on logic and the first book of Ferrater Mora I had ever read. The book . . . opened my mind to a new world of rigor and clarity. It had a decisive influence in determining both my vocation and my professional career." (Transparencies, 105)

José Luis Aranguren remarked that, "Jesus Mosterín testifies to the importance that Lógica matemática . . . has had for the members of his generation in Spain. For them, it marked the beginning of a growing interest in that country . . . in modern formal logic." (Transparencies, xxii)