Do ghosts really exist? Halloween is nearly upon us. Scientists may argue that ghosts are imaginary, but other thinkers have offered a more creative argument.
What philosophy says about spookiness

Glossary
Paranormal - Beyond normal scientific understanding.
Philosopher - A thinker who comes up with ideas about big questions in life.
Grief - Very great sadness, especially at the death of someone.
Theory - An idea that you have yet to prove.