The platforms did not drift into engagement-maximizing design. They set out to do it, and they wrote the goal down.
Across more than a decade and several companies, internal board decks and strategy documents state a teen-time-spent objective in plain language. No outsider needed to characterize the intent. The company characterized it, internally, for its own board.
This brief is drawn from the public litigation record: trial exhibits, produced documents, and deposition testimony. Where the record contains a denial, the denial is quoted here too. We are not building a case out of selected documents. The contradiction is the case, and it only works if both halves are in front of the reader.
Ten years of the goal, stated by the company.
These are not advocacy characterizations. Each entry is a line from an internal document, with the exhibit reference shown on the right.
The design objective, written plainly
An internal presentation outline sets out the objective for a video platform being acquired: make it feel “less like a utility and more like an addictive experience I can come back to daily.”
JCCP trial exhibit 04503
Teen time, reported to the board
A year-end board presentation reports progress on increasing family teen time spent, and describes new experiences launched to serve the next generation of teens. The audience is described as under-13 users.
Dkt. 2889-64
The strategic objective, stated as the goal
A strategy document sets the objective for the first half of the year in one line: the overall goal is total teen time spent. A companion document states the goal as increasing time spent among teen users.
JCCP trial exhibit 00085; Dkt. 2885-18
Usage growth described as a success
A product review reports that more people are using the platform longer and more frequently than ever before, framed as the positive result of recent work.
Dkt. 2756-52
Still a product priority
A product state-of-the-union document continues to track teen time spent alongside other core metrics, and records a plan to sunset a feature that prompted users to take breaks from the app.
Dkt. 3011-2
How the ranking system worked
An internal message describes the ranking system as tuned to maximize engagement in a “maximally empirical, principle-less way,” and states that it applies to teens as much as to the general population.
Ex. 37, Dkt. 3011-19
The executives testified otherwise. Both things are in the record.
We are not asking you to take our word over theirs. We are showing you that the two accounts are incompatible, and letting you see both.
“Our practice is not to give teams goals to specifically optimize or increase time spent.”
Testified in deposition.
Mark Zuckerberg, Dkt. 2865-5
Teen time spent was “not our goal for business reasons.”
Testified in deposition when questioned about teen time spent as a goal.
Adam Mosseri, Dkt. 2756-1
A deposition answer is a legal statement under oath, and it carries weight. It also sits directly against internal documents created years earlier, in the company’s own words, and produced in the litigation. Which account a fact-finder accepts is not something we can tell you in advance. What we can tell you is that the question exists, that it has been asked on the record, and that the documents do not appear to have been withdrawn.
Four disciplines, one conclusion.
The expert record in this matter is unusually broad. That matters: a single retained expert is easy to discount, and four independent disciplines are not.
Addiction medicine
An addiction-medicine expert wrote directly to the head of Instagram that its overall goal remained total teen time spent, and opined that time-spent goals had been set despite contrary congressional statements.
Expert report of Anna Lembke, M.D., New Mexico matter
Computer science
A computer scientist opines that the recommendation algorithms are optimized to maximize engagement, which drives advertising revenue, and that product testing encourages addictive design by prioritizing short-term engagement.
Trial report of Arvind Narayanan, Dkt. 3234-3
Psychology and marketing
A psychologist opines that features designed to increase time spent are inherently at odds with well-being and displace activities that add value.
Trial report of Adam L. Alter, Dkt. 3234-1
Economics
An economist models revenue and profit from teen and “aged-up teen” users against time-spent thresholds, including engagement beyond roughly thirty minutes per day.
Expert reports of Carl S. Saba, Dkt. 3010-12; Dkt. 3246-7
The economics is the part parents most often ask about directly. We do not publish revenue figures, settlement amounts, or case values on this site, and we will not estimate what any individual claim is worth. That question is answered case by case, after review of the actual records.
What this brief does not show.
It does not show that your child was harmed. Nothing in this series can. That question is answered by a medical chronology, a behavioral record, and an analysis of what else could explain what happened — for one person, over one period. The briefs in this series establish that features existed, that knowledge existed, and that the intent evidence exists. Causation is a separate and much harder question.
It does not show that every teenager was harmed. Population-level association between social media use and youth mental health is well documented in the research literature and is genuinely contested as to magnitude and mechanism. Researchers disagree. Defense experts attack that research in court. We are not going to present a contested field as settled, because doing so is easy to expose and it costs a client the credibility the rest of this record depends on.
It does not establish liability. What a company intended and what a company is legally responsible for are different questions, answered by different rules in different jurisdictions.
This is a summary of a public record for general information. It is not legal advice and it does not create an attorney-client relationship.
A stated business goal is a different case from a feature nobody examined.
This is the practical reason the intent record matters. The question in most product-liability litigation is whether a company should have known. When the objective itself is documented, the question becomes narrower — and harder for a defense to answer with “we never considered it.”
That is a legal argument, and it is made in a courtroom, on a full record, with experts both sides. What a family can do in the meantime is limited but real: preserve the platform data, preserve the device, and preserve the medical chronology. Those three things decide more individual claims than any amount of reading about the design intent does.