In Exercise determine whether the argument is valid or invalid. You may compare the argume...

In Exercise determine whether the argument is valid or invalid. You may compare the argument to a standard form or use a truth table.

If the astronaut visits the space station, then the astronaut uses the space shuttle. The astronaut uses the space shuttle or the astronaut uses the Soyuz spacecraft. Therefore, the astronaut does not use the Soyuz spacecraft.

▲ The International Space Station