The quality or state of being dichotomous; the character of existing as or involving a division into two parts.
From 'dichotomous' plus the noun suffix '-ness' (the quality or state of). This abstract noun emphasizes the fundamental nature of binary division.
The dichotomousness of the on-off switch was so powerful that it revolutionized computing—but interestingly, modern quantum computers are trying to escape binary logic entirely by using quantum bits that are simultaneously 0 and 1.
Complete word intelligence in one call. Free tier — 50 lookups/day.