There&#x27;s also the problem of undecideability as outlined in &quot;Large Limits to Software Estimation&quot;: scribblethink.org&#x2F;Work&#x2F;kcsest.pdf, plus supporting material: <a href="http:&#x2F;&#x2F;scribblethink.org&#x2F;Work&#x2F;Softestim&#x2F;softestim.html" rel="nofollow">http:&#x2F;&#x2F;scribblethink.org&#x2F;Work&#x2F;Softestim&#x2F;softestim.html</a><p>Between psychological (biases) and neurological issues (like 5 +&#x2F;- 2) and mathematical limits, estimation is pretty hopeless.