Search engine algorisms

Search engines, genuine commercial search engines like google , would be continuously updating the algorithms ( which would be called algorisms) even on day to day basis to make their operations of fetching correct results more efficiently and also to filter out the useless , cheating efforts by the so called paid SEOs. Now a days every body is becoming a seo with a little learning and attempting to optimize the pages. But , google is too intellegent to turn down these efforts to cheat the engine. In my opinion , only google is really doing dynamic algorisms to improve the search engine operations, though we do not see the results directly quite often. Yahoo and msn are lagging behind in evolving efficient algorisms. Yahoo goes my the appearance of keyword more number of times in heading and description , along with page rank of google. Msn knows the ways what it only knows. Their algorisms are beyong established logics and they are not very serious to evolve into a great search engine. Even ater so much work, these engines lack the intellegence. They are equipped with organs like eyes, ears and nose. Google goes by eye senses like a monkey , yahoo goes by the sound senses using ears while msn goes by the smell only like a blind animal. None of these engines reached the stage of having some intellegence like man. If you do not agree with this, look what type of pages google offers at top ranks, while that page contains a single line of content and google ads. I have seen many such MFA pages.
Other sites linking to the site is also a bogus theory. The person who searches never bothered if the content is from a most linked site or remote site. He just want content, rich content. Then if search engines go by page ranks which are based on number of links to the site, how you can give a correct page for the search?
I heard that now a days enriching the alt tag with keywords has negative impact on search engines. I dont know how far this is true at this moment. But one thing is sure, we can not trust anyone's predictions about algorisms of search engines. In fact the present three search engines are not sufficient for us. We should have at least three more efficinet engines like yahoo and google.