When things get tough, Cortana fails to offer Google Now and Siri a challenge45
here), Google Now is in the lead and managed to offer insight for exactly a third (33.3%) of queries, while Siri finished second, managing to asnwer 25.8% of the 60 questions each was asked. As for Cortana, she managed just 11.7%.According to the results (you can see the way the assistants were scored
These all sound pretty bad (even Google Now's), so what on earth were they asked? Well, for example, all three were asked whether radon is an actinide and what causes Alzheimer's, among others (you can see the full list and how each of the assistants did here). We tried out some of the questions ourselves (picked at random), and can confirm that our own test yielded the same results.
Wonder when (and if) Google Now and the rest will be able to offer adequate help with as tough questions? Us too.