I came across three polls posted by the same author more or less giving the same meanining.
Although there is no rule or way to find it, i request members not to post similar polls to maintain the quality of this website. If it is not possible for somebody to remember the polls they have posted, they can view the polls in My account -> My polls which lists all the polls posted by the member till date.
"Empty mind is mind of Ghost " those person who post this type of poll should improve himself to post creative things rather than without meaning poll.