Lets say 1.
A search engine is a number of components - e.g. a crawler, an index, and a user interface.
Why should one company be able to own all three of these? Why not just one? Perhaps crawling should only be able to be sold as a wholesale commodity.
The extreme version of your argument would have companies own the IP to a particular for loop's iterator variable name.
“My” argument is a generalization of the argument people are making that Google should only be allowed to operate “one” service.