text: var sameVendorPrefixes = require('./vendor-prefixes').same;
  
  function understandable(validator, value1, value2, _position, isPaired) {
    if (!sameVendorPrefixes(value1, value2)) {
      return false;
    }
  
    if (isPaired && validator.isVariable(value1) !== validator.isVariable(value2)) {
      return false;
    }
  
    return true;
  }
  
  module.exports = understandable;
  