What Can an AI Misread in a Journal Summary? A Practical Source-Checking Guide
When you ask AI to summarize a diary entry, check whether each statement preserves the entry’s details and degree of certainty. Pay special attention to who did what, when it happened, whether a plan was completed, and whether the summary turns a passing thought into a firm decision. A useful check is simple: can you point to words in the original entry that support each claim?
Why a fluent summary can still change the record
A summary can sound clear and plausible while slipping away from its source. Research on summarization treats factual consistency as a separate question from whether the text reads well: one study’s method checks summary sentences against supporting spans in the source, and reports that those spans helped people verify claims. Kryscinski et al., “Evaluating the Factual Consistency of Abstractive Text Summarization”
That distinction matters in a diary because the source may be brief, informal, and full of implied context. A system might smooth shorthand into polished prose, but smoothing can also introduce a relationship, cause, or conclusion that the entry never stated. NIST describes confabulation as generated content that can diverge from its input, and notes that confident wording can make false content persuasive. NIST, “Artificial Intelligence Risk Management Framework: Generative Artificial Intelligence Profile”
Check people, actions, and ownership
First verify the basic event: who acted, what they did, and who owns a plan or preference. Pronouns, group references, and omitted subjects are easy to misread when a note is compressed. “Sam said we could meet Friday; I’ll check my schedule” does not establish that the writer agreed to meet. A summary that says “I planned to meet Sam Friday” has turned a suggestion into a decision.
Look for swapped roles as well. If an entry says “I sent Jo the recipe after she asked,” the summary should not imply Jo sent it. Re-read every name and “I,” “we,” “they,” or “someone” in the summary against the original. When the diary leaves the actor unclear, a faithful summary should preserve that uncertainty or leave the detail out.
Preserve time, sequence, and whether a plan happened
Distinguish a past event from a current intention, a possibility, and a completed action. “Might take the bus,” “decided to take the bus,” and “took the bus” are different records. Likewise, “booked a table for Saturday” is not the same as “went to dinner Saturday.” Check tense and verbs such as *considered*, *planned*, *cancelled*, and *finished*.
Sequence can matter even when all the events appear in the summary. If the entry says a shop was closed, so the writer made tea at home, reversing those events changes the account. For longer entries, check beginnings, middles, and endings rather than relying on a summary that seems to capture the overall theme. Research on long-document summarization has reported that models can favor information near the start and end of a source; its proposed method uses overlapping sections to address this problem. That finding concerns evaluated summarization systems, not a guarantee about any particular journal tool. Li et al., “Improving Faithfulness of Large Language Models in Summarization via Sliding Generation and Self-Consistency”
Watch for certainty, tone, and invented explanations
A diary may record a guess, a question, or an unfinished thought. A summary can accidentally upgrade “maybe the shop changed its hours” into “the shop changed its hours.” It can also attach a reason the writer did not give: “I skipped the market because it was raining” adds a causal link if the original merely mentions rain and a missed market.
Compare certainty words, not just nouns. “I think,” “perhaps,” “I forgot,” and “I’m not sure” each limit what the entry establishes. A short summary need not retain every hedge, but it should not present an uncertain interpretation as a settled fact. Treat polished explanations and confident conclusions as claims that need direct support in the source.
A quick sentence-by-sentence verification method
Use this three-pass check before keeping or reusing a summary:
Mark each factual claim. Underline names, dates, actions, quantities, locations, decisions, and reasons. Split a sentence into separate claims if it contains several details.
Find the source wording. For each claim, locate the phrase or sentence that supports it. If no wording supports it, label it “not stated” rather than filling the gap from what seems likely.
Compare strength and sequence. Check that the summary has not made a possibility certain, moved an event to another day, reversed the order, or changed an intention into a completed action.
Repair narrowly. Correct the unsupported detail, preserve an ambiguity, or delete a claim that cannot be checked. Then read the revised summary beside the entry once more.
For example, suppose an entry says: “Asked Lee if the plant shop had basil. They were out. I’ll look at the weekend market if I have time.” “I bought basil at the market” is unsupported: the entry records neither a visit nor a purchase. “I may look for basil at the market this weekend” keeps the plan tentative. These are illustrative examples, not research findings.
When to ask for a shorter or more literal summary
If the generated version keeps adding motives or conclusions, give the task narrower boundaries: ask for events and explicit plans only, preserve uncertainty, and leave reasons out unless the entry states them. You can also request a brief list of claims with the supporting phrase from the entry beside each one. Then check that the quoted phrase actually supports the claim: source text displayed alongside a sentence makes verification easier, but the source match still needs to be real.
For a short note, comparing the summary directly with the entry may be quicker than generating another version. For a long entry, check it section by section and pay extra attention to details in the middle. Keep the summary only when its claims track the writing; if a detail cannot be confirmed, revise or remove that detail rather than treating fluent wording as proof.