austtr - 2:05 pm on Oct 17, 2012 (gmt 0)
Knowledge is easy for Google to collect on a basic level
I presume you mean Google will extract information from the sites it has indexed. That is where many people start to have a problem.
a) Google does not own any of the resources from which they will extract the knowledge. The information is not theirs to take and use for commercial gain.
b) How can Google know if knowledge extracted from a website is true? How effective can a knowledge engine be if the answers cannot be relied upon for accuracy?