Test for Dementia

why not?
in tests like these assumptions are necessary. without this assumption, there is no right answer

 

no assumption is wrong in these tests
these tests are all abotu using the information given correctly, not adding possibility to the situation

 

when not enough information is given in the question, assumptions must be made. by the answer he has given for this particular question, he is assuming that it is impossible to overtake the person in last place, which is not always the case

 

I agree, although by 'he' I assume you are talking about Bedlam which i must point out is a female.

 

good point
though id be very surprised to find out that bedlam was the original author of this material