this Method can never be more than this;--Observation and Experience show that such has been the uniform operation of Nature in this particular _so far as can be discovered_, and _in all probability_ it will always continue to be such. _High Probability_, amounting, it may be, at times, to an assurance of certainty, is the strongest proof which this Method can, from its very nature, produce. To establish a Principle or Law for a _certainty beyond any possibility of doubt_ by the Inductive Method, it is essential that we should know that we are in possession of every Fact in the universe which has any relation to the given Principle, or rather that we should know that there are _no_ Facts in the universe at variance with it. To _know_ this, it is necessary to be in possession of _all_ the Facts in the universe, since the Inductive Method has no mode of discovering when it has sifted out of the immense mass of Facts all those which exist in connection with any given Law. As we shall _never_ be in possession of all the Facts of the universe, we shall never be able, by the Inductive Method, to possess _certainty_ in respect to the future operations of Nature; and thus we discover the insufficiency of this Method as a perfect guide to the acquisition of knowledge. The famed Inductive Method, like the Anticipative or Hypothetical, furnishes, in truth, only an _assumption_ as a starting point for reasoning in the endeavor to establish other Facts than those already known. The verification of the Law or Principle assumed is, indeed, in the former Method, as complete as it can be, in the nature of the case, while in the latter it is not; but we have just seen that the strongest proof which Observation, Classification, and Induction can give is that of High Probability, on the _supposition_ that a certain number of Facts from which a Law is derived include substantially all that the whole range of Phenomena belonging to the given sphere would represent. Any possible application of the Inductive Method is, therefore, only a nearer or more remote approximation to an Exactitude and Certainty which the Method itself can never _fully_ attain.