Memetic Memory [Investigation]

Requires Researcher Feat

You can spend 1 hour (which can be done during a short rest)
bolstering your knowledge about a skill or tool. You must have
reference materials or other similar resources on hand to do so.
Choose a skill or tool. You gain proficiency in this skill or tool
for a number of hours equal to twice your Intelligence modifier
(minimum of 2 hours). You cannot gain proficiency with more
than one skill or tool at a time with this feature and you can only
gain proficiency in this way once per long rest.

Next Rank /Rigor/