Jessica Simpson 's dad isn't a fortune teller ... so he can't say with certainty that his daughter and Eric Johnson will ever get back together -- but, he's not ruling it out either.

We caught up with Joe Simpson at the Giving A Smile Foundation Gala in Beverly Hills Thursday night ... and we asked him if he could see Jessica and Eric jumping back into a relationship after announcing their split early this year. Gallery Launch Gallery Getty

Simpson says you never know what may come in the future ... which certainly sounds like a "maybe" to us -- though given the messy nature of the breakup , we wouldn't say it's super likely.

Remember ... Jessica told us in January, "Eric and I have been living separately, navigating a painful situation in our marriage. Our children

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