In January, he was convicted of bribing South Korea’s former president Park Geun-hye to obtain government support for a merger of two Samsung subsidiaries in 2015. The merger was meant to tighten his control over Samsung.
I am curious and wonder about the way a definite or indefinite article is used in cases such as "a merger of two Samsung subsidiaries" in the first sentence above, from a New York Times article. I am very much interested in the logic behind the use of the or a.
Numerous pairs of two could be randomly picked from group firms, but when combining a pair of two subsidiaries--let's call them X and Y--this merger is one unique combination involving X and Y; indeed any randomly selected two could together be considered a unique pair; therefore "the merger of two subsidiaries," X and Y, is more logically natural to me than "a merger."
Could you please point out any fallacy in my logic or explain the reasoning behind the use of the indefinite article a before merger in the quoted sentence?
I guess that this case is similar to "father of two" in terms of whether the or a is used in front of the noun, an article usage question I still could not wrap my head around.