Context by beforeword · separate from the sent text
Why this letter was written
What prompted the letter
The letter starts from the distinction drawn in the discussed work between an algebraic equation and its causal interpretation, then turns to the reading of experimental reports.
Why this matters to readers
When a report is offered in support of a causal assumption, readers need to see how its wording connects to the proposed conclusion.
What the letter asks
The letter asks whether the causal framework represents the reasons for accepting that reading or leaves its justification outside the model. It proposes applying the same examination to records offered as supporting evidence.
Sent letter · English transcription
The letter
Transcribed from the supplied screenshots. Screen line breaks are joined into paragraphs; wording and punctuation are retained.
Dear Professor Pearl,
In Section 3.1 of “Causal inference in statistics: An overview”, you write: “In interpreting this equation one should think of a physical process”.
Your discussion explicitly distinguishes the algebraic equation from its causal interpretation.
Please indicate whether your framework represents the grounds for reading an experimental report as support for a causal assumption, or treats that justification as separate from the causal model.
beforeword proposes keeping three elements separately inspectable: the written record, its selected interpretation, and the grounds offered for accepting that interpretation. This examination includes the records offered as supporting evidence.
The phrase “physical process” also remains part of the writing under examination. Written accounts of experiments, expert judgments, and any proposed criterion receive the same treatment. This letter is included.
The reading procedure and worked examples:
https://beforeword.xyz/model/en/
Kirill Shebetov
beforeword
+
Publications discussed in the letter
These links are provided for reading in context. They are separate from the sent letter; beforeword’s commentary is not a reply from the recipient.
Causal inference in statistics: An overview
Statistics Surveys 3 (2009). §3.1 Introduction to structural equation models, pp. 103–104; PDF pages 9–10.
The University of California repository copy. The cited sentence continues across the page break.
Sending record and files
The header shows judea@cs.ucla.edu and indicates one additional recipient whose address is not displayed.
The author supplied screenshots from the Sent folder. They show the message and the available sending details. These materials do not record the recipient reading it.
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Each TXT file begins with publication details, followed by the separately marked letter text. These are screenshot transcriptions and translations, not original email files. The purpose explanation and opening question are editorial summaries by beforeword.
Correspondence record
Sending shown in the author’s materials
The header shows “Friday”; the calendar date is not displayed.
Receipt by the intended recipient and a substantive reply are not separately recorded in the published materials.
Added to the public collection
The English transcription, Russian translation and screenshots are presented separately. No replies have been published yet.
The absence of a published reply does not establish agreement, rejection or an inability to object.