the devil is in the detail


the devil is in the detail(s)

Plans, actions, or situations that seem sound must be carefully examined, because minor details can end up causing major, unforeseen problems. Double check your code—with software, the devil is in the details.See also: devil

the ˌdevil is in the ˈdetail(s)

used to say that it is the small individual parts of a task, a written document, a design, etc. that may cause most problems and difficulties: In any negotiation, the devil is in the detail.See also: detail, devil