It is not right to make a promise unless one is sure he can fulfill the promise.
This sentence contains one main and two subordinate clauses.
The main clause is <em>It is not right to make a promise, </em>and the two subordinate clauses are <em>unless one is sure </em>and <em>he can fulfill the promise.</em>
Paradox; a statement or proposition that, despite sound reasoning from acceptable premises, leads to a conclusion that seems senseless, logically unacceptable, or self-contradictory.
Oxymoron; a figure of speech in which contradictory terms appear in conjunction.
Hope this helps :D
Yes , around 25 - 100 km ( based on where you live)
