Based on that assumption of the search results pollution, and also assuming the self-evident trend of social media saturation of popular events continuing to rise in proportion to our global population and rising Internet-usage, I would expect to see more such pollution in search results until the search algorithm is edited to account for it.
Out of interest I hopped onto Bing (don't worry, I washed my hands afterward) and inputted the same search query: "define: game theory".
Bing did a hell of a lot better than Google.
Basic use case: Both Google and Bing served me the definition I asked for. So they both nailed the most important use case. Although the definitions were identical, Bing's was slightly superior by offering a citation for the definition instead of white-labeling it with their own brand like Google did. Point to both.
Design: Google shows 3 info objects (the definition and 2 web results) in the same number of screen space (609 x 805). Bing displays 4 (the definition and three web results). Point to Bing.
Relevance: Google's relevance rating for the query is 66% since one info object was objectively irrelevant as visible from the info displayed. (Looks like a cool Twitter account though, and I'm now following him because of Google's mistake.) Bing's relevance rating for the same query is 100% because all 4 of the returned objects were objectively relevant to the query. Point to Bing.
Result: Bing search beat Google search 3 to 1.
- The Google search algorithm seems to favour the transient content of social media over permacontent to a greater extent compared to Bing, which appears to favour permacontent over transient social media content.
- Bing is more concerned with the whole query, whereas Google search is more willing to take risks delivering less conventional content in order to find value opportunities through trial and error. This approach makes sense from a process development point of view, because it will mean Google's search improves faster as a result of making more mistakes. Bing, if unwilling to do so to the same extent, is at a disadvantage because mistakes in search results are likely to draw more negative attention than Google's will due to public perception of Google as "the best" and Bing as a "me too" competitor in the search engine service category.
Thanks for learning!