It's not really that cheap if you take a long look at it. Lets say it can melt. But if it does inded have a melting point it's up there with the temperatures of a star or an atom bomb. On one ocaison Wolverine was flung into the sun in a spaceship with Jean Grey, he killed her to spare the suffering but eventually she was reborn and saved them both. But for a while Wolverine was surviving intensely high temperates (and gravity) and the metal wasn't melting. Not to mention he was at the epicenter of a nuclear blast without it melting. So a lightsaber might have to match that sort of temp to even think about melting it.Abandon4093 said:
But even if they did, then you have to hold the blade to the adamantium long enough for it to start heating up, that's something Wolverine's going to make difficult. Even then lets say he can't move. The adamantium is likely going to transfer that intense heat into his body which is going to constantly heal, so in a way his muscles and blood are going to act like a heatsink. So the question is can the light-saber impart heat faster than he can dissipate it throughout his body and enough for the adamantium to heat to whatever high temp it has? Even if it can produce a positive amount of heat how long will that take? Weeks?
On paper it's incredibly unlikely that it could cut through adamantium. That said it's unnecessary if a force wielder wanted to kill him they could probably cut between the gaps in his spine to decapitate him or stab him through the heart.