4 ms·

Sex isn't binary either.

• collyw 10y ago
  In the vast majority of cases it is.
  • dragonwriter 10y ago
    A trait either is binary or is not (being binary is, itself, binary.) A trait that the vast majority of the time takes on one of two values, but other times takes on other values, is not binary.
    • mrits 10y ago
      male,female,null
      • dragonwriter 10y ago
        Even if that was the exact set of possible values, that's not binary (though I suppose if someone overexposed to SQL might mistake it for a being binary...)