The Crisis of the Multiverse
&gt; Theoretical and observational evidence suggests that we are living in an enormous, eternally expanding multiverse where the constants of nature vary from place to place.<p>Really? What is this evidence? I didn&#x27;t see much of it in the article.<p>Also, the &quot;sleeper&quot; argument (at least as presented?) seems to be flawed. To repeat, the argument is this:<p>Suppose you are cryogenically frozen, to be woken up in either 1 year or 100 years, determined by the flip of a coin right after you&#x27;re frozen. Furthermore, say that the population of the Earth doubles every year, and each year 1% of people undergo this experiment. Now suppose you wake up, and wonder how much time has passed. There are two lines of reasoning:<p>1. Obviously, the odds are 50&#x2F;50, since the result was determined by the flip of a coin.
2. Whatever year it is, most of the people waking up from the experiment were frozen last year (when the population of Earth was higher).<p>The article then concludes that &quot;The fact that two logical lines of argument yield contradictory answers tells us that the problem is not well-defined.&quot;<p>But they&#x27;re not contradictory; either may hold depending on what you know. The probability of an event depends on your knowledge. Assuming you remember when you were frozen, then there are two possibilities: &quot;I am John Doe who was frozen in 2020 and woke up in 2021&quot;, or &quot;I am John Doe who was frozen in 2020 and woke up in 2120&quot;. Thus line of reasoning #1 holds. On the other hand, if you&#x27;re an experimenter who&#x27;s <i>greeting</i> people as they wake up, then there are many possibilities: &quot;It&#x27;s 2120, and this was one of the 70 million people who was frozen in 2020&quot;, or &quot;It&#x27;s 2120, and this was one of the 140 million people who was frozen in 2119&quot;. Thus line of reasoning #2 holds, and the person you&#x27;re greeting was probably frozen last year. No contradiction.