Buying a duplex that may have knob and tube electrical.

[Alan K Auman]

So as the title says I am looking at a great property with long term tenants already in place so the property is truly turnkey and the price is right. However I have a suspicion that the property may still be fully knob and tube but won't know for sure until the inspection is done. I'm fairly certain I won't be able to get it insured if I am correct about the knob and tube but I wanted to get opinions from people more "in the know" than myself. Thanks in advance.