  Putting all these replies together, then, we have The  Psychological Criterion of Personal Identity: X at  t1 is the same person as Y at  t2 if and only if X is uniquely  psychologically continuous with Y, where psychological  continuity consists in overlapping chains of strong psychological  connectedness, itself consisting in significant numbers of direct  psychological connections like memories, intentions,  beliefs/goals/desires, and similarity of character (Parfit 1984,  207). We will see the meaning and importance of the  “uniqueness” clause later.