Idiot Savant

Idiot Savant is a perk in Fallout 4.

Effects
This perk will randomly multiply the amount of experience gained from any action that grants experience, including quest completions, making it very useful to grab at a low level so that you can maximize the amount of extra experience gained. The effect is multiplicative with the well rested bonus giving a total multiplier of 3.3 or 5.5 depending on the rank of the skill.

When the perk activates, you will see a laughing Vault-Boy above your compass, as well as hearing a laughing sound.