وَيَسْقُطُ خِيَارُهُ بِأَنْ يَجُسَّ الْمَبِيعَ إِذَا كَانَ يُعْرَفُ بِالْجَسِّ، أَوْ يَشُمَّهُ إِذَا كَانَ يُعْرَفُ بِالشَّمِّ، أَوْ يَذُوقَهُ إِذَا كَانَ يُعْرَفُ بِالذَّوْقِ
Translation: The blind purchaser’s inspection option ends by touching goods known by touch, smelling those known by smell, or tasting those known by taste.
The relevant question is which sense reveals the quality ordinarily used to identify the goods. A token touch does not establish everything about every kind of object.
This clause assigns an effective mode of recognition according to the class of goods.
It does not require touch, smell and taste together for every purchase; the suitable mode depends on the goods.