Yes, I recognised that ab initio.
Thistle, may I humbly suggest that the only universally proposed personal views that people want to hear on a Catholic Forum are those of the Pope or past Popes/Councils - not of individual lay members.
Your position would in essence mean that all Catholics could claim they cannot commit a mortal sin because they are unable to 100% understand the reason behind teachings.
With all due respect this is a discussion forum where individuals can put forward whatever points they wish relating to Church teachings and other faith/moral related subjects as long as they do it respectfully and without ad hominem attacks.
It is my view that the the condition of full knowledge is satisfied by a person knowing that the Church says a particular act is of grave matter. That does not require understanding, albeit we should all try to understand what underpins Church teachings, but simply requires acceptance. If you have a magisterium document which states otherwise I am happy to be corrected.
The point I was making is that if you argue (using the word you generally and not you specifically) that a person can only have full knowledge if they not only know something is of grave matter but they must also 100% understand why then any Catholic could claim they have never and can never commit a mortal sin.
As for the Pope’s position on potentially allowing divorced people with no annulment and remarried access to the Eucharist I am entitled to disagree with that. If you care to search the forums you will see many threads and extensive discussions on this topic which appear to show many laypersons to priests, bishops and cardinals strongly disagree with him. In fact this is probably one of the most controversial issues that has the clergy up in arms.