Without any doubt, the journal impact factor (IF) is one of the most debated scientometric indicators. Especially the use of the IF for assessing individual articles and their authors is highly controversial. Most scientometricians reject this way of using the IF. They argue that the IF tells something about a journal as a whole and that it is statistically incorrect to extend its interpretation to individual articles in a journal. The well-known San Francisco Declaration on Research Assessment, which has received widespread support in the scientific community, also strongly objects against the use of the IF at the level of individual articles. Even Clarivate Analytics, the company that calculates the IF, advices against IF-based assessment of individual articles.