Personally I think it's dependent on the circumstances before the split and the circumstances to which both people now find themselves in. Very bad break ups shouldn't even attempt a second retrial. When it's tainted, from bad reasons, it won't ever be the same & the spark and chemistry just won't go back to normal. Trivial break ups, perhaps, stand chance of working it out! Sometimes people need to break to appreciate and realise what they have. Perhaps a separation shows the grass isn't always greener. Is infidelity or cheating was the reason behind it, NEVER, trust will never fully be amended. No matter how hard you want or try, it's always there at te back of ur mind. I don't believe in second chances personally. Good luck