10. The analysis of doctrines inductively obtained, into their constituent facts, and the arrangement of them in such a form that the conclusiveness of the induction may be distinctly seen, may be termed the _Logic of Induction_. By _Logic_ has generally been meant a system which teaches us so to arrange our {106} reasonings that their truth or falsehood shall be evident in their form. In _deductive_ reasonings, in which the general principles are assumed, and the question is concerning their application and combination in particular cases, the device which thus enables us to judge whether our reasonings are conclusive is the _Syllogism_; and this _form_, along with the rules which belong to it, does in fact supply us with a criterion of deductive or demonstrative reasoning. The _Inductive Table_, such as it is presented in the present chapter, in like manner supplies the means of ascertaining the truth of our inductive inferences, so far as the form in which our reasoning may be stated can afford such a criterion. Of course some care is requisite in order to reduce a train of demonstration into the form of a series of syllogisms; and certainly not less thought and attention are required for resolving all the main doctrines of any great department of science into a graduated table of co-ordinate and subordinate inductions. But in each case, when this task is once executed, the evidence or want of evidence of our conclusions appears immediately in a most luminous manner. In each step of induction, our Table enumerates the particular facts, and states the general theoretical truth which includes these and which these constitute. The special act of attention by which we satisfy ourselves that the facts _are_ so included,--that the general truth _is_ so constituted,--then affords little room for errour, with moderate attention and clearness of thought.