 The best way to tell whether such a result carries any evidential value is for the experiment to be replicated—preferably by another research group. If a result cannot be robustly replicated, it is probably a mirage. Such mirages have turned up to a disturbing extent recently, as Daniel Kahneman has famously pointed out (Yong 2012; see also Wagenmakers et al. 2012). Kahneman proposed a “daisy chain” of replication, where no result in psychology would be published until it had been successfully replicated by another prominent lab. This proposal has not yet been (and may never be) instituted, but it has raised the problem of replication to salience, and a related project has taken off. The reproducibility project in psychology aims to establish the extent to which prominent, published results can be  replicated.[17]  Experimental philosophers have followed suit with their own replication project (see the Other Internet Resources). This work has recently yielded encouraging fruit: a large collaborative replication effort suggests that approximately 7 out of 10 experimental philosophy results can be reproduced, whereas similar efforts show that less than half of the results in biomedicine, economics, and psychology are replicable (Cova et al. 2021, Other Internet Resources). On the other hand, as discussed throughout this entry, many influential experimental studies in moral psychology have failed to replicate. 