A situation in which there are multiple valid options for next step in a process.
Any situation in which the outcome cannot be completely predicted in advance.
The doctrine that all human actions are not so much determined by the preceding events, conditions, causes or karma as by deliberate choice or free will.
A case in which the uncertainty principle applies; a case in which certain pairs of physical properties such as the position and momentum of a particle cannot be known simultaneously.
The belief that all events that occur have already been determined.