i$.$ Academic references are often described using a digital object identifier $($DOI$).$ Following the guidance at Referencing and plagiarism, use the Cite Them Right Harvard style to give a full reference to the paper with the identifier DOI:$10\mathrm{.}1093/$mind$/$LIX$\mathrm{.}236\mathrm{.}433.$

$(2$ marks$)$

ii$.$ What thought experiment was famously described as a game at the start of that paper? How was the game intended to operate when applied to computers, and what was it intended to demonstrate?

Note: you do not need to read the whole of the paper to answer this question. You might like to skim its first three pages to check that the description in the module is a fair representation of the argument; much of the rest of the paper addresses other topics.

$(5$ marks$)$

iii. Why might a web CAPTCHA be considered as an alternative form of this test?