The advent of Large Language Models (LLMs) has made a transformative impact. However, the potential that LLMs such as ChatGPT can be exploited to generate misinformation has posed a serious concern to online safety and public trust. A fundamental research question is: will LLM-generated misinformation cause more harm than human-written misinformation? We propose to tackle this question from the perspective of detection difficulty. We first build a taxonomy of LLM-generated misinformation. Then we categorize and validate the potential real-world methods for generating misinformation with LLMs. Then, through extensive empirical investigation, we discover that LLM-generated misinformation can be harder to detect for humans and detectors compared to human-written misinformation with the same semantics, which suggests it can have more deceptive styles and potentially cause more harm. We also discuss the implications of our discovery on combating misinformation in the age of LLMs and the countermeasures.

On Memorial Day weekends past, you might have joined in the All-American ritual of firing up the grill, cracking a cold one, and feuding with your family over which hot dog condiment is correct. But this holiday, you might not have as many wieners to argue about. Across the US, the coronavirus that causes Covid-19 has rampaged through cold, cramped, meat processing facilities, sickening thousands of workers and killing at least 30 of them. With dozens of plants closed or cutting back operations, meat shortages have been forcing some grocery stores to ration grilling staples like ground beef and chicken breasts. At least one sausage factory, in Milwaukee, has had to hit pause on its hot dog production line.

We love Money Heist, too, but it's probably time for a break from Netflix. So, join us for our upcoming web events on bats' (undeserved?) Wednesday, May 27, 4 p.m. Eastern: Are Bats Really to Blame for the COVID-19 Pandemic? Tuesday, June 2, 4 p.m. Eastern: Free Speech Project: Should We Think Twice Before Limiting Political Advocacy? Earlier this month, Singapore unveiled Spot, a social distancing-enforcing robotic dog that is now "patrolling" a park.