Irreconcilable Differences
Fundamental disagreements between spouses that cannot be resolved, commonly cited as grounds for no-fault divorce.
Example
They cited irreconcilable differences in their divorce petition.
Canadian Equivalent
In Canada, this is referred to as Marriage Breakdown (breakdown of the marriage established by one-year separation, adultery, or cruelty).
Jurisdiction Variations
Irretrievable Breakdown
New York uses 'irretrievable breakdown of the relationship for at least six months'
Insupportability
Texas uses 'insupportability' — discord or conflict that destroys the legitimate ends of marriage
Irretrievably Broken
Florida's no-fault ground is that the marriage is 'irretrievably broken'
Irretrievable Breakdown
Pennsylvania uses 'irretrievable breakdown' with mutual consent or 2-year separation
Irreconcilable Differences
Illinois uses the standard term with a 6-month separation requirement
Irretrievable Breakdown
Connecticut uses 'irretrievable breakdown'
Irretrievably Broken
Georgia uses 'marriage is irretrievably broken'