Apologies to the Raku folks if my description made it sound like a bad design decision. It is true that defaulting to Rat approach is distinctive (although not

Apologies to the Raku folks if my description made it sound like a bad design decision. It is true that defaulting to Rat approach is distinctive (although not unique). Let me try again. My case is that Num (ie P754 floating point) is not well aligned to decimals that humans use in most everyday circumstances. Thus the famous (0.1+0.2==0.3) example which works with Rat and breaks with Num. The only benefit of a Num over Rat is performance and the disbenefit is that Num has limited precision and range. Unless you are talking about irrational numbers, when you have to have imprecision anyway. Therefore having Rat as the default means that Num is an option for the coder to increase execution speed, but only if they accept the implications for precision and range.