What do you call someone who doesn't observe details?

Question

My mom is so ... that I had to explain that I was being sarcastic.

user405662 · Answer

Obtuse or Thick apply in such contexts.
Caveat: Using these words for one's mom would be considered downright rude.
Obtuse

lacking sharpness or quickness of sensibility or intellect :
INSENSITIVE, STUPID

He is too obtuse to take a hint.
Thick

obtuse, stupid

[Merriam-Webster]
Perhaps, you should go with imperceptive.

Danny Schoemann · Answer

maybe guileless - considering the sentence.
guileless: devoid of guile; innocent and without deception.

2 Answers