Inspect

Inspect is an action performed by pressing the appropriate button when available.

Until you have picked up an item, or are close enough to an item, it will be unknown to your hominid. Inspecting allows you to determine what a new item is.

Inspecting also allows you to determine if food is safe to eat or  drink. Unripe, rotten, or unsafe food will cause your hominid to reel away in disgust to show that the food isn't safe to eat.

Learning specific neurons increases your inspect abilities.

Mechanics
Approach an unknown item and pick it up. There will be black smoke and reddish colored eyes of fear swirling on the item indicating it is unknown to you. You need to have the item in your right hand for the Inspect action to appear to be able to start inspecting the item. Switch hands (if needed) and then press the appropriate button to inspect the item. You hominid will inspect the item and it will be revealed to you. From that point forward the item will always be known to you and no longer needs inspecting.

For larger items or gathering spots that you are unable to pick up, you only need to be near the unknown item. The item will also have the black smoke and red eyes of fear indicating it is unknown to you. When you are close enough, the Inspect action will appear and you can press the appropriate button to determine what the item is.

For food that you can eat or drink, pick it up, and place it in your hands. Inspect the food by pressing the appropriate button and your hominid will give a reaction after inspecting the food. If the hominid reacts positively and is happy, the food is safe to eat. If the hominid reacts with disgust and displeasure, the food isn't safe to eat and will give  Food Poisoning.

It isn't required to have to have used Intelligence or Senses to find a  Point of Interest, focused on the item, and identified the item before inspecting the item. You can just pick up or be close to an unknown item and inspect it to reveal what it is.

Discover is the location equivalent of inspect. Get close enough to an unknown location and Discover appears instead of Inspect.

Neurons
The following neurons impact inspect.