"Common sense is never common!" (A must read, by Joseph James @Kingjworld )

Well, I know you might be surprised to see me talk on this theme; "Common Sense is Not Common" .

This thing got me wondering after I dropped a logical question on my social network saying;

Abeg my wonderful friends!
Mek una help me answer this question o!!!
Mary's father has 5 daughters;
1) Lala
2) Lele
3) Lili
4) Lolo
What is the name of the fifth one????
[If u can answer this, u are a genius. Bcus 80% can't]

To my surprise too, 80% persons got this question twisted.
Mind you, this persons are all intelligent, but a few I realized genius.
Another adjective to qualify the word 'Common' is 'Ordinary'.
And another word for 'Sense' is 'Awareness/Sensitivity'.

Well, on a recap, I realise youths most especially, tends to down grade things thinking its simple, while it isn't.
My word for the youths will be;
"When next you are faced with any challenge, make sure you take ur time to give ur best, stay focus , and then you'll get a good result."

But mean while, who's got any answers to my Mary's Fathers question?