Is it permissible for a young man to marry the daughter of his elder maternal uncle if he was nursed by his younger maternal aunt, who is the sister of his father, given the doubts about the number of feedings and whether they reached the legal threshold for prohibition?

If a young man doubts whether he was suckled by his maternal uncle's mother, or is unsure about the number of feedings, then no prohibited degree of kinship is established. This is because the default is that no suckling occurred until it is proven with certainty, and the suckling that establishes prohibition must consist of five full, satisfying feedings. Based on this, it is permissible for him to marry his maternal uncle's daughter, although it is preferable to avoid it due to the doubt.