People in their 60 ’ s, 70 ’ s, and even 80 ’ s have overcome illiteracy or have learned new languages.
لَا شَكَّ أَنَّ ٱلتَّأَقْلُمَ مَعَ ٱلظُّرُوفِ ٱلصِّحِّيَّةِ ٱلْمُتَغَيِّرَةِ هُوَ أَمْرٌ صَعْبٌ .‏