The term 'middle ground' can refer to a COMPROMISE, a gray area, or PURGATORY. A COMPROMISE is an agreement between two parties in which each party gives up something in order to reach a mutually beneficial outcome. A gray area is a situation that is not clearly defined and can be interpreted in different ways. PURGATORY is a state of limbo between heaven and hell, where souls are purified before entering heaven. All three terms refer to a situation where there is no clear answer and both sides must make concessions in order to reach a resolution.