On a Mission of Fishing

Two fathers and their two sons go fishing together. They each catch one fish to take home with them. They do not lose any fish, and yet when they arrive at home they only have three fishes. 

How can this be?

This is how it can be! 

Source 

Three Generation On Mission

What's the matter? 

There are grandfather, father & grandson. So there are 2 fathers viz. father & grandfather while there are 2 sons viz. father & grandson! Three generations on the mission.

Three Generations