Answer:
im guessing trivia but it could be tremendous
Explanation:
The correct answer would be that all of the elements mentioned were part of St. Thomas Aquinas philosophical system. He considered himself an Aristotelian (followed Aristotle's teachings which in modern day are considered the development of Plato's teachings), an Empericist (it is the theory that all knowledge comes from sensory experiences) and a Neoplatonist ( believes mind over matter and that reality is subjective; depends on the highest principle). And since he was before anything a Christian theologian, then all the elements are part of his system.
Answer:
Logos is the use of logic within an argument or to prove a point.
Answer: his brother.
Reason: By the way you phrased the question I am assuming that the author is also a part of the story. Since the author is part of the story, and therefore a character, he can not know about his father when he was younger, only narrators can do that. Also the same goes for the grandfather. Since the author is also a part of the story, most probably the main character, he would not refer to himself in third person. Therefore through process of elimination his brother in the only possible option left.