Which of these is real

Here is a question to trigger the mind of the inquisitive one:

1. Let us say there is a table in your dining room. Lets say the table is perceived using the following ways:

• You go into the room and see the table
• You sleep and dream about the table
• You think about the table in your office and make imaginary modifications to it
• Your neighbour talks about the table in your dining room (he has never seen it)
• You dream that your neighbour goes into the dining room and sees your table

The question to the reader is: Which of these tables is real?

2. Now lets say there is no tiger on the table, but you perceive a tiger using all 5 of the above ways. (For the first way, you see a tiger like you see a snake in a rope - kids often have imaginary friends).

Now the same question, which of these tigers is real?

3. If you say that the table in your dream is real (way 2) and the tiger in your dream is NOT real (way 2), can you perceive real and false objects using the same way?

4. What are the implications for scientific experimentation from the above answers you have arrived at?