While researching a topic, a student has taken the following notes:

• The fifth Solvay Conference on Physics was held in 1927.
• It brought together twenty-nine of the era’s preeminent scientists to discuss the emerging field of quantum theory.
• The conference famously featured a debate between physicists Albert Einstein and Niels Bohr.
• Bohr proposed that subatomic entities like electrons had only probable realities until they were observed.
• Einstein argued that subatomic entities like electrons had a reality independent of observation.
• Bohr’s position, later called the Copenhagen interpretation, remains the most widely accepted theory of quantum mechanics.