
    Design a function that consolidates multiple assessment scores from various grading criteria and evaluators into a unified set of scores for comprehensive student feedback analysis. The function should take nested lists of numerical scores as input, where each inner list contains scores from different grading dimensions (such as grammar, content, and structure), and produce a single collection of all unique scores without any duplicates.
    

    
def extract_singly(test_list):
    """
    Design a function that consolidates multiple assessment scores from various grading criteria and evaluators into a unified set of scores for comprehensive student feedback analysis. The function should take nested lists of numerical scores as input, where each inner list contains scores from different grading dimensions (such as grammar, content, and structure), and produce a single collection of all unique scores without any duplicates.
    

    """
def extract_singly(test_list):
    """
    Design a function that consolidates multiple assessment scores from various grading criteria and evaluators into a unified set of scores for comprehensive student feedback analysis. The function should take nested lists of numerical scores as input, where each inner list contains scores from different grading dimensions (such as grammar, content, and structure), and produce a single collection of all unique scores without any duplicates.
    

    """
    res = []
    temp = set()
    for inner in test_list:
        for ele in inner:
            if not ele in temp:
                temp.add(ele)
                res.append(ele)
    return res