Abstract
As far as the cognition in the planning is concerned, it is important that the clearness of the knowledge is assured. By the direct clear knowledge we mean the self-clear knowledge which enables to be the evidence of other matter. And the speech about things which we intend to plan has this direct clearness. From this direct clear knowledge, we can get the indirect clear knowledge. The indirect clear knowledge. bases upon the direct clear knowledge. R. Chisholm shows nine principles which are applied to the direct clear knowledge and get some indirect clear knowledge. He calls them the rules of evidence. I analysed them from signifying behavior and referring behavior, and showed the key point of such rules was the inductive confirmation. I correspond signifying behavior to expressing the direct clear knowledge, namely, the discourse about the planning object, and referring to expressing the indirect clear knowledge, namely, the discourse about the realized object in planning. And I correspond the process from the direct to the indirectto the process from signifying to referring, and I showed the brief application of these nine rules to the locutions in planning and discussed the problem about the application of these rules to planning. Finally, I discussed the possibility of the conversion of referring in to signifying.
