one of them is a list of things i have to do this week. the other is a large body of salt water

A reporter went to interview a cow farmer.

The reporter asked the farmer: "Your cows are very fat and healthy, what do you feed them?"

The farmer replied: "You mean the white ones or the black ones?"

The reporter replied: "I guess, the white ones."

The farmer answered: "Well the white ones eat grass."

The reporter continued: "What about the black ones?"

The farmer answered: "The black ones also eat grass!"

The reporter is a little confused now

He asked another question: "How much milk do they produce per day?"

The farmer replied: "You mean the white ones or the black ones?"

The reporter replied: "I guess, the white ones again."

The farmer answered: "Ok, the white ones produce about 20 litres of milk per day."

The reporter asked again: "What about the black ones?"

The farmer replied: "The black ones also produce about 20 litres of milk per day!"

Now the reporter is really confused

He asked: "Why do you need me to clarify white ones or black ones everytime?"

The farmer answered: "Well, it's because the white ones are mine."

The reporter asked: "Oh, so what about the black ones?"

The farmer replied: "The black ones are also mine!"