Additional arguments (kaldı ki)

When building a case—like choosing a university or defending a career path—you can deliver a final, decisive argument using the conjunction kaldı ki.

moreover / besides (the fact remains, anyway)
kaldı ki

Translating to "moreover," "besides," or "the fact remains that," kaldı ki introduces an additional reason that makes your previous statement even stronger.

That university is very well-established. Besides, the most prestigious department is there.
O üniversite çok köklü. Kaldı ki, en prestijli bölüm orada.

Use it to stack positive or negative points when justifying an important life choice:

This is an ideal option for you. Besides, you will study on a scholarship in the department.
Bu senin için ideal bir seçenek. Kaldı ki, bölümde burslu okuyacaksın.
Medicine is a very difficult department. Besides, I don't want to specialize in a new branch.
Tıp çok zor bir bölüm. Kaldı ki, yeni bir branşta uzmanlaşmak istemiyorum.

Punctuation

Kaldı ki most commonly starts a new sentence, but it can also follow a semicolon when the two thoughts are closely linked.

This profession is not ideal for me; besides, I would not be satisfied with that salary.
Bu meslek benim için ideal değil; kaldı ki o maaşla tatmin olmam.