Complex sentence: The bargain theory has largely replaced the benefit-detriment theory in modern contract theory, instance, a deal in which the promisee feels subjectively relieved, but hasn't actually gained any legal rights, might satisfy the bargain theory but not the benefit-detriment theory.
Split into simpler sentences: The bargain theory has largely replaced the benefit-detriment theory in modern contract theory. For instance, a deal in which the promisee feels subjectively relieved, but hasn't actually gained any legal rights, might satisfy the bargain theory but not the benefit-detriment theory.