Sorry you dropped out of your one-room school in the fifth grade.
Palestine was internationally recognized as a state during the Mandate. Don’t take MY word for it, take the word of the League of Nations:
‘The Permanent Court of International Justice and an International Court of Arbitration established by the Council of the League of Nations handed down rulings in 1925 which determined that Palestine and Transjordan were newly created successor STATES of the Ottoman Empire.’ (Marjorie M. Whiteman, Digest of International Law, vol. 1, U.S. State Department [Washington, D.C.: U.S. Government Printing Office, 1963] p. 636)
‘Israel’: invented narrative slung by knuckle-walkers. Palestine: the actual documented record.