If we try to formulate our mind demanding indetification and relevance with society as watching trend and our personal option, we could be given some so certain diaglam. Then that relevance in personally identified factual truth should be formed like next.

If Nominal value and Real value index could be taken to definition A, and its reference by us could be taken to definition B, and after we checked them all, acting in option and practicing commerce, shopping or investing, these each embodied act could be taken to definition C, these relevant acting in order could be described with logical symbols like next. (These serial indication is dependent on mind philosophy, not obedient only to economics)

A→C is the decision making process on mind. 

　　　
         ∀⊃A

（∀⊃A）reference means B, then necesarily B means

      （∀⊃A）⊃ B

Then, acting in opted method and bying, if these serially action could be difined C, necesarily

      (（∀⊃A）⊃ B ) ⊃ C

These serially running process, we could opt one commodity(includes stock)
Then these mind process means, so substantially,

             A ∨ B ∨ C

Then, if our delibarating process could mean  A ∨ B ∨ C,
Our opting mind process could be

             A ∨ B ∨ C ⇒  (（∀⊃A）⊃ B ) ⊃ C

Right clause could be mind's interpreting process. Then according to approach right side, opted acting could be completed.

(to be continued)

Mar. 23rd.   2021