Representativeness heuristic is defined as the reaching towards the similar items and things to organizing them into grouping of prototype.It helps in organizing and computing the elements easily.
According to the situation, Craig is giving the opinion or idea about people of New Zealand on basis of category prototype as he though Karl is funny and friendly so other people of New Zealand would have similar feature even though he did not meet several people.Thus, Craig is using repressiveness heuristic for assembling people of New Zealand as being represented by Karl.
Letters from a Persian general could help to understand a timeline of events during that ancient war between Greece and Persia through what is written in the letters explaining the mindset of the general at the time of writing the letter.