Philosophy on validity and logic

1. When is a statement or idea valid? (a trick question)
2. Define what it means to say that an argument is deductively valid.
3. Invent an example of a valid argument that has false premises and a true
conclusion. Invent an example of an invalid argument that has true premises and
a true conclusion.
4. What does it mean to say that truth is objective, not subjective?
5. What is philosophy?
6. Logic: what is an argument?