What is the main conflict in Copenhagen by Michael Frayn?

The conflict in Frayn's play can be seen as a search for truth. There are three people involved in this play and each of them has their own version of what happened during that 1941 meeting. Each character offers an opinion of that night and an opinion of the effects that their relationships had on each other. Although the premise of the play is the search for the truth, the reader comes away wondering if there is one truth that all three characters would agree on. Each character's interpretation varies slightly from the others, possibly providing a germ of truth to the whole, but parts of each version conflict with the other character's versions.