#DifferentialPropositionalCalculus • 1.5
https://inquiryintoinquiry.com/2020/02/18/differential-propositional-calculus-1/

Figure 3. Back, To The Future
https://inquiryintoinquiry.files.wordpress.com/2020/02/differential-propositional-calculus-figure-3.jpg

Figure 3 preserves the initial #UniverseOfDiscourse \(X\) and extends the basis of discussion to a set of two qualities \(\{q, \mathrm{d}q\}.\) In corresponding fashion, the initial #PropositionalCalculus is extended by means of the #EnlargedAlphabet \(\{``𝑞", ``d𝑞"\}.\)