What is true?

Do you remember those things at school where you had to pick the 'true' statement? I remember one in primary school where everyone questioned each statement as being false...because you cannot be certain of anything.

This makes me think about the idea that repeated in many of my sociology classes- There is no Truth only Truths, there is no Reality only Realities.

So, which statement is correct:-

1. The Sun will rise tomorrow.

2. All people are frustrating some of the time.

3. 'Friends' get really annoying when you have seen each episode more that once.