Forgive, but not forget? Try again!

It is great to forgive and forget, but sometimes the feeling of personal injustice does not allow for that. It puzzles me though how often people wrongly say "I forgive, but I won't forget" when often what they actually mean is "I can't forgive, but I will try my best to forget and put it at the back of my mind". In other words, when someone says "forgive, but not forget", you just know you have not been forgiven!