[:rational tangibility:] • I will use the term rational tangibility for the degree to which a concept may be understood through rational pursuit alone • Note that there are arguments to be made both that (A) nothing may be fully understood through rational pursuit alone; and that (B) everything may. • Even if (A) is the case, it's certainly true that rational understanding helps more with some concepts than with others. And even if (B) is the case, it's certainly true that not everything can be understood with rationality as it is now; it needs more philosophical development. • I will not otherwise address this • Examples: • Poetry and art tend to have a low degree of rational tangibility • Mathematics and science, by design, have a high degree of rational tangibility. Arguably, mathematics is the art of objectivity. (Also arguably, mathematics does not completely shirk subjectivity.) • Note that rational tangibility is not intended to be the same thing as objectivity/subjectivity: to say something is rationally intangible is not to say that it is subjective. We may all experience color similarly (low degree of subjectivity) but we will still struggle to describe it to each other (low degree of rational tangibility)