What are the two parts of formal hearing procedures?

The Accused and The Plantiff

The presence of both in a general to explain themselves or what transpired.

After this or before this, a secret hearing/interrogation is conducted. Therefore the General and Interrogation are types of formal hearings and those involved are the Accused and Plantiff

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.

in this scenario it would be the consumer demand as most influential in making the decision. the band members need to figure out where and from whom they will make the most money, in other words who out of the two consumer groups - football fans or car drivers - will spend their money, who is more likely to contribute to their cause and buy what they are offering.