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cf., Sent.I.D8.Q1.A3; Sent.I.D19.Q5.A1.Rep3; Sent.I.D19.Q5.A1.Rep7; QDeVer.Q1.A1; QDeVer.Q1.A2.Rep1
St. Thomas answers in the affirmative since "that which is, is." For, "truth" only adds the notion of a relation to the intellect to being. This is why "true" is called a "transcendental."
Yet, we must be careful. We cannot thus argue that, "truth is convertible with being, goodness is convertible with being (as stated above), therefore, truth is goodness."