SQL & PL/SQL :: Getting Date Gaps From Data Of Date Field

I have a date field that should be filled everyday with today's date and I need to get the days that were not entered.

i.e. :

CREATE TABLE TRY_F (DAT DATE);

INSERT ALL
INTO TRY_F VALUES (to_date('01/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('02/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('04/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('05/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('06/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('08/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('10/01/2011','DD/MM/YYYY'))
INTO TRY_F VALUES (to_date('14/01/2011','DD/MM/YYYY'))
SELECT * FROM DUAL;

I need a smart way of getting the dates that were missed in DAT.