i have read an article about this question!公仔箱論壇0 }# p3 h' Z7 K C% N' \
A man send a carton of eggs and a hen to his own living place,
5 j' q+ N" n$ f* Eand he realised that the eggs arrived before the hen do!
7 _4 C2 |* H4 f! yThen he claims that eggs come before hen |