a+b=c is a relation between a,b,c. In logic term is the number f that implies all three number a,b,c https://docs.google.com/document/d/1Wd3mL2Azm5t76_wlhJHaZqUboJWWpPA457ypCD2ITKk/edit?usp=sharing https://groups.io/g/lawsofform/message/995