def check_consecutive(claimset_list):
    """
    Checks claims are numbered consecutively.

    :param claimset_list: set of (number, text) tuples for claims.
    :type claimset_list: tuples (int, str)
    :return: true for consecutive; false if check fails
    """
    previous_number = 0
    try:
        for number, claim in claimset_list:
            if number == previous_number + 1:
                previous_number = previous_number + 1
            else:
                return False
        return True
    except:
        return False
