That's a matter for an inquiry
I have been watching admiringly the way in which the Government conducts its business and I have decided to take a leaf out of their book. In particular I am a huge admirer of their method of resolving disputes over what happened, who said what when, and whose fault it is. And so I have decided to adopt a more formal approach to these kinds of disputes in my own life.
Issues like this are frequent sources of ongoing disputes in my house. For example, there is the so-called "but you said" issue. Say a small child is badgering me to go to the park.
I might decline and say, "Not now, Daddy is working." (Reading the paper or looking at an iPad is technically work for me.) Where the dispute will arise is where someone will say, "But you said this morning you would bring us to the park to play."