Can ambiguity be good for us?

I've been interested in the Irish problem for the past 50 years.

I lived in Birmingham in the 1970s and experienced how it feels when terrorists strike close to home. In the 1980s I was sent to Northern Ireland to investigate money laundering in the bad lands around Belfast. Most of those funds were to be used by terrorists. Much more recently I've taken a genetic test and discovered that although my mother was English and my father Scottish my genes are 42% Irish.
I worry that Brexit will return Ireland to the state it was in before the Good Friday Agreement, others write off that agreement as being an ambiguous fudge of a solution. The author of this Flip Chart Fairy Tale has some views worth considering.
Maybe sometimes ambiguity is all we need.