"Q. In a match between A and B, B made a statement which A interpreted to
mean that his (A’s) next stroke was conceded. Accordingly, A lifted his ball. B
then said that he had not conceded A’s next stroke. What is the ruling?
A. If B’s statement could reasonably have led A to think his next stroke
had been conceded, in equity (Rule 1-4), A should replace his ball as near as
possible to where it lay, without penalty.
Otherwise, A would incur a penalty stroke for lifting his ball without
marking its position – Rule 20-1 – and he must replace his ball as near as
possible to where it lay."