Leonard Susskind says so. But I don't see it. Yes, the present "here and now" is computed by nature from the events lying in its past light cone + the laws of nature. If we assume a deterministic universe, the present "here and now" contains the information from the events in its past light cone. But when we introduce quantum randomness and uncertainty, we can not say that anymore. The present "here and now" is computed by the events in its past light cone + the laws of nature, + an element of uncertainty or randomness. The "here and now" can never tell us precisely what the past events were like, because it may have been defined by a random quantum "jump" altering what classical theory would have predicted. So, in which way can we say that information is conserved when we include quantum mechanics? Surely Susskind is much more clever than I am so I must be wrong in something.