human
Given a midpoint and a coordinate work out the position of the other coordinate, where all the values are integers but at least one is negative Tom and Katie are arguing about midpoints.
\( M \) is the midpoint between points \( P \) and \( Q \).

Tom says if you know the location of \( M \) only, then there is more than one possible location for \( \mathrm{P} \) and \( \mathrm{Q} \).

Katie says if you only know the locations of \( M \) and \( Q \), then there is more than one possible location for \( \mathrm{P} \).
Who is correct? Neither is correct
gpt
Believes that one point is enough to specify a line