AI is continually updated as it is learning new material each day. With that said here is what my original perplexity.ai answer stated at 2:18 am on January 1, 2025:

"To rank the repurposed drugs in terms of the number of metastatic cancer pathways blocked, we can summarize the findings from the available research. Below is a ranking based on the evidence regarding their effects on various cancer pathways."

The 19 ranked drugs in the answer are displayed in the series of screenshots you see in this article.

After the publication of this Substack, I asked AI the same question again. At 5:18 pm on January 1, 2025 - when AI was asked the same question - the perplexity.ai answer is different and as follows:

"I apologize, but I don't have enough information from the provided search results to accurately rank the listed repurposed drugs based on the number of metastatic pathways they block. The search results don't contain specific data on the number of pathways blocked by each of these drugs."

AI failed to provide a ranking in this 5:18 pm answer to the same question.

There you have it.

Was this change in the AI answer a result of new knowledge or of censorship programming? I will let readers decide.