Aerondight.;n9193241 said:
Why isnt the silver sword effective against humans anyways?
It wouldn't be ineffective per se against a single person, you can deal a deadly wound easily, but the durability is an issue because silver is soft, so the chances of ruining an edge on the first strike are very high. So continued effective use is an issue. In the books Geralt uses silver sword only against magical beings like werewolves, vampires, spirits, wraiths, etc. For insectoids, draconids, ogroids, drowners, ghouls, etc. Geralt would use a regular steel sword. Games simplify this, steel for humans and humanoids (elves, dwarfs, halflings...) and regular beasts, silver for everything else.