Firstly, unscrew the bottom of the G2 pen. Take out the ink cartridge. Do not take out the spring. Place the new ink cartridge, or simply the refill, place it into the pen and screw the bottom back...
You have to LISTEN carefully. When they say ''If this is a pen, is this a pen", say yes. When they say "Is this a pen?", say no. Then they are going to ask, "But if this is a pen is this a pen?",...