When I mean &quot;stone old&quot; I mean of corse better than todays ideas. This should be clear from the context. Not everything which is fast is also good.<p>You can also come up with some kind Greenspun&#x27;s tenth rule applied to neural net&#x27;s:<p>&quot;Any sufficiently complicated modern AI program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp.&quot;<p>In this case not even that.