Study the statement below and answer the questions that follow:
"Given two distinct points, there exists exactly one straight line that passes through them."
(i) Restate the above postulate in your own words.
(ii) Using only this postulate, prove that two distinct straight lines cannot have more than one point in common.
(iii) If two distinct lines were assumed to have two common points, what logical contradiction would arise? Explain the contradiction step by step.