def check_special_conf(dict_):
    """This function ensures that an init file uses appropriate specifications for
    binary and categorical variables.
    """
    msg = (
        'The specified probability that a binary variable is equal to 1 has to be sufficiently lower than one.'
        )
    for variable in dict_['VARTYPES']:
        if isinstance(dict_['VARTYPES'][variable], list):
            if dict_['VARTYPES'][variable][1] >= 0.9:
                return True, msg
    return False, ' '
