Israeli-American Nobel laureate Prof. Robert Aumann came out firmly last Thursday against giving up more than four prisoners to Hamas as Israel negotiates indirectly with the terror organization for the release of two soldiers' bodies and two live civilians.

"Israel needs to change the paradigm, present a new price list," he said in a Makor Rishon article. "Cold, intellectual, uncompromising. There is no more one to 1,000 ratio. One living terrorist, in exchange for one living prisoner. The body of a terrorist in exchange for the body of an Israeli soldier."

Hamas captured the bodies of IDF soldiers Oron Shaul and Hadar Goldin during Operation Protective Edge in 2014. Two mentally ill civilians, Abera Mengistu and Hisham al-Sayed, crossed into the Gaza Strip on their own in 2014 and 2015 respectively, and it is assumed that they are still alive in Hamas hands.

There can be no more "Gilad Shalit deals," in which Hamas returned one live soldier in 2011 for 1,027 terrorists, he wrote, especially since "we're still paying the price for him, in blood."