I understand that purposely leaving out a mortal sin, or any relevant detail e.g. number of times, amount in the case of stealing etc. or anything that changes the gravity of the sin invalidates a confession.
However, would any of the following invalidate a confession. This is in relation to mortal sins:
Purposely phrasing or carefully wording the sin in a way that all of the required information is provided but in a way that the priest won’t query a situation that could be taken out of context.
Carefully wording the detail of the background to a sin to the extent that it might have been underplayed in cases where it is a detail that is not relevant to the gravity of the sin, rather background information.
I’ve mentioned this in confession and the priest has said that it’s ok.