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?