14. What Has Logic to do with the Act of Mere Apprehension? -- Logic is concerned with the acts of the reasoning faculty in so far as it can direct them towards what is true. Now we have seen that truth and error appertain to judgment, and not to mere apprehension (5). What, then, has logic to do with the study of concepts? -- They concern it in so far as they furnish the matter of true judgments and occasion erroneous judgments.