أُثْنِي عَلَى اجْتِهَادِهِ، لَا عَلَى كُلِّ أَقْوَالِهِ.
I praise his diligence, not everything he says.
The latter qualification is iḥtirās because it blocks the unwarranted implication that praising diligence approves every opinion. In tatmīm, an additional phrase instead provides a useful completion without primarily correcting such an inference.
أَحْسَنَ إِلَى صَدِيقِهِ عِنْدَ الشِّدَّةِ.
He treated his friend well in a time of hardship.
The temporal phrase adds a meaningful circumstance enhancing the deed. The first addition averts misunderstanding; the second completes the useful picture.