This is actually a very good comment. Some of these ideas are nested, logically. A Heuristic is not per-se biased, although a subset of heuristics is in fact associated with the origin of the term 'cognitive bias'. Viz,
Although much of the work of discovering heuristics in human decision-makers was done by Amos Tversky and Daniel Kahneman,[4] the concept was originally introduced by Nobel laureate Herbert A. Simon. Gerd Gigerenzer focuses on how heuristics can be used to make judgments that are in principle accurate, rather than producing cognitive biases
Also Holmes is not a good example of a rationalist; his main ability comes from being a fictional protagonist. Holmes cannot be a much better source of rationality advice than Conan Doyle, who quite literally believed in fairies.
[1]: http://en.wikipedia.org/wiki/Cognitive_Bias