system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Could someone tell me why inflation happens? I've been told inflation happens when oil prices go up. Oil has gone down recently, no? Why don't the prices of goods go down if oil goes down?
gpt
Inflation is related to the amount of currency in circulation. The more money that is in circulation, the less value an individual unit (1 dollar, etc) of that money has. The effect is that prices go up. What once cost you $10 might now cost you $12 because the value of your money has gone down.

It has absolutely nothing to do with the price of oil.