The Islamic Prophet Muhammad carried out a siege against the Banu Qaynuqa tribe known as the Invasion of Banu Qaynuqa in February 624 Muhammad ordered his followers to attack the Banu Qaynuqa Jews for allegedly breaking the treaty known as the Constitution of Medina by pinning the clothes of a Muslim woman, which led to her being stripped naked As a result, a Muslim killed a Jew in retaliation, and the Jews in turn killed the Muslim man. This escalated to a chain of revenge killings, and enmity grew between Muslims and the Banu Qaynuqa, leading to the siege of their fortress.:122 The tribe eventually surrendered to Muhammad, who initially wanted to kill the members of Banu Qaynuqa but ultimately yielded to Abdullah ibn Ubayy's insistence and agreed to expel the Qaynuqa.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who's insistence led the Prophet Muhammad to expel the Banu Qaynuqa Jews instead of kill them?
Ah, so.. Abdullah ibn Ubayy

Today the boundaries of the Ukrainian language to the Russian language are still not drawn clearly, with an intermediate dialect between them, called Surzhyk, developing in Ukraine.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The boundaries between which languages are clearly known?
Ah, so.. unanswerable

PCBs intended for extreme environments often have a conformal coating, which is applied by dipping or spraying after the components have been soldered. The coat prevents corrosion and leakage currents or shorting due to condensation. The earliest conformal coats were wax; modern conformal coats are usually dips of dilute solutions of silicone rubber, polyurethane, acrylic, or epoxy. Another technique for applying a conformal coating is for plastic to be sputtered onto the PCB in a vacuum chamber. The chief disadvantage of conformal coatings is that servicing of the board is rendered extremely difficult.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): If a PCB is intended for use in an setting with extreme conditions, what would probably be applied?
Ah, so..
conformal coating