In this account by Lotze of the operations of the forms of thought, there is clearly put before us the picture of a continuous correlative determination of datum on one side and of idea or meaning on the other, till experience is again integral, data being thoroughly defined and connected, and ideas being the relevant meanings of subject-matter. That we have here in outline a description of what actually occurs there can be no doubt. But there is as little doubt that the description is thoroughly inconsistent with Lotze's supposition that the material or data of thought is precisely the same as the antecedent of thought; or that ideas, conceptions, are purely mental somewhats extraneously brought to bear, as the sole essential characteristics of thought, upon a material provided ready-made. It means but one thing: The maintenance of unity and wholeness in experience through conflicting contents occurs by means of a strictly correspondent setting apart of facts to be accurately described and properly related, and meanings to be adequately construed and properly referred. The datum is given _in_ the thought-situation, and _to_ further qualification of ideas or meanings. But even in this aspect it presents a problem. To find out _what is_ given is an inquiry which taxes reflection to the uttermost. Every important advance in scientific method means better agencies, more skilled technique for simply detaching and describing what is barely there, or given. To be able to find out what can safely be taken as _there_, as given in any particular inquiry, and hence be taken as material for orderly and verifiable inference, for fruitful hypothesis-making, for entertaining of explanatory and interpretative ideas, is one phase of the effort of systematic scientific inquiry. It marks its inductive phase. To take what is discovered to be reliable evidence within a more complex _situation_ as if it were given absolutely and in isolation, or apart from a particular historic situs and context, is the fallacy of empiricism as a logical theory. To regard the thought-forms of conception, judgment, and inference as qualifications of "pure thought, apart from any difference in objects," instead of as successive dispositions in the progressive organization of the material (or objects), is the fallacy of rationalism. Lotze, like Kant, attempts to combine the two, thinking thereby to correct each by the other.