Even though stupid people sometimes get things right, and smart people sometimes get things wrong, that doesn't say anything about how often they do so (comparatively). You can't use those rare cases to negate the 'assumption' that intelligence aids correct judgements. It just means that intelligence is not a 100% guarantee of correctness - but we knew that anyway. As it stands, the usefulness of different aspects of intelligence - reasoning, analytical ability and so on - in assessing probablities and making judgements is fairly obvious.
Also, even if the ...
My school doesn't offer IB, but there's an ToK equivalent under our CIE (Cambridge International Examinations) course called Thinking Skills. It's a bit more focused than ToK - it doesn't try to teach students how to think, but instead focuses more on specific thinking techniques. For example, there's an emphasis on deconstructing arguments, analysing essays, and identifying logical reasoning. While that's not quite as useful as what well-applied ToK sounds like, it's probably a bit more realistic in terms of ability to convey information to pupils - it's ... (read more)