Today I bring you something that happened to me not long ago. A person close to me warned me that the TRESemmé product I was using (a conditioner) caused cancer due to the dmdm hydantoin it contained and that it emitted formaldehyde into the product. This comes from a complaint filed in the United States. So I decided to read the complaint, and in fact, it presented several true and troubling facts. A deeper analysis reveals the importance of half-truths in disinformation.