It is said that oil and water do not mix. This phrase is also used to describe two people who do not get along and cannot even stay near each other. But technically speaking, oil and water can be mixed. When you mix oil and water, you will find that droplets of oil float in the water. If you add an emulsifier (something that helps emulsion – the mixing of oil and water – such as soap or egg white), the oil droplets break down into very fine droplets that spreads through the water to make a stable emulsion fluid. Thus, even something like oil and water that appear to never mix can be mixed using science. Not only that, but some foods that we enjoy so much such as mayonnaise, milk and vinaigrette are all emulsions. Two fluids with different densities and properties, never wanting to be together, can combine to form such a great mixture.
If two people who never get along and refuse to mix were to congeal like mayonnaise, they may form a surprising combination, producing synergy.