&gt; Just ask them to rank the horoscopes after the purported predicted time frame …<p>And that&#x27;s the experiment I meant. Some will lie to swing the result to their liking, some will respond with bullshit for whatever other reasons. And the rest may easily respond &quot;mostly true&quot; if the author of those horoscopes has enough skill to make them sufficiently truistic and vague, which is what they typically do. Like, &quot;something important will happen to your life in the next month because Jupiter blah blah blah&quot;.<p>My point is: horoscopes are unfalsifiable <i>by design</i>. Or by evolution with mutations, selection and stuff - whatever floats your boat.