Reasoning and evidence

Every concept-preview answer has a reasoning graph. Click a node to see the passage it rests on, checked against its source, or the search that found nothing.

Every answer on ephemerisx.com/ask sits on top of a reasoning graph: the findings the answer was built from, arranged in the order the argument runs. The graph is how you check the answer, one claim at a time.

The reasoning graph#

The Reasoning section for How did the RP1 efficacy estimate change through the FDA review? Columns Company figures, Approved population, FDA's concern, Committee and Approval hold nodes joined by lines; the node 34%, DoR 24.8 mo is selected. On the right, the evidence panel shows the path Answer, Reasoning, Company figures, Evidence, the node label, Form 8-K, found in source, the passage with 34% response rate and 24.8 months highlighted, and Source document, at this passage. — Figure 1. The reasoning graph for *How did the RP1 efficacy estimate change through the FDA review?*, with one node selected.

1Reasoning. Click any node to inspect the evidence behind the conclusion.
2Legend. A blue bar on a node's left side means an FDA document, orange a company filing (SEC). A dotted box was Searched, not found, or is not in record.
3Stages. Columns in the order the argument runs, left to right. Here: Company figures, Approved population, FDA's concern, Committee, Approval.
4A node. One finding: a short label in our words, and the document it comes from (8-K · Apr 13, FDA · Apr 10 · p. 4). The selected node has a dark border; View source ↓ appears under the node you point at.
5Path. Where this evidence sits: Answer → Reasoning → Company figures → Evidence.
6Node label. Repeated, and marked Node label: our summary, because it is ours, not the source's.
7The check. ✓ found in source: the passage was found, word for word, in the document.
8The passage. As the source prints it, with the words the answer relies on highlighted.
9Source link. Source document, at this passage → (or , page 4 → for an FDA letter) opens the original.

Explore the graph#

Point at a node to light up its chain: everything it rests on, and everything that rests on it. Unrelated nodes fade.
Click a node (or focus it and press Enter) to open its evidence in the panel on the right. The chain stays lit until you choose another node.
Click a citation chip in the answer to open the same panel for that quote. The chip names the passage that holds the quoted words.
When a graph first appears, the node the answer leans on most pulses gently: a good place to start.

Searched, not found#

Some of the most useful findings are absences: what a company's filing does not say about the FDA's letter. These appear as dotted nodes.

The reasoning graph for How did Replimune's 8-K characterize the FDA's concerns? Columns FDA letter, Apr 10, 2026 and Company 8-K, Apr 13, 2026 pair each FDA deficiency with the company's response. The dotted node Not in the 8-K (searched) is selected, opposite Early Phase 3 analysis: insufficient. The panel shows Form 8-K, no match, whole document searched, and the terms searched for: RP1-104, unplanned, interim, 10%, early analysis. — Figure 2. A “not in” finding: the FDA called the early Phase 3 analysis insufficient; the 8-K does not mention it.

1Two columns, side by side. On this question, the FDA's letter on the left and the company's 8-K on the right, each FDA point opposite the company's account of it.
2The dotted node. Not in the 8-K (searched), opposite the FDA's point it does not address.
3∅ no match. Shown instead of ✓ found in source, with whole document searched.
4What was searched for. Every term, so you can repeat the search yourself in the document behind Source document →.

Where an answer names documents it did not search, the panel says so: This answer did not search these documents. They are named so the gap is visible. An answer can also say a document is not in this record; for example, the FDA's own approval documents for RP1 are not yet among the sources.

Why every answer comes with its graph#

A fluent answer is easy to produce and hard to check. The graph turns one paragraph into a set of findings, each small enough to check in seconds against the passage it rests on. If a finding fails, you can see exactly which part of the answer falls with it: that is what the chain is for.

Showing absences as nodes matters just as much. “The 8-K does not mention it” is a claim about the whole document; the dotted node makes it a claim you can test, with the search terms in front of you.