experiment: align investigation response input

docs/design-evolution-log.md

@@ -369,10 +369,52 @@ A smaller initial input will make beginning an investigation feel easier and wil
 
 Pending visual review.
 
+#### Result
+
+Confirmed.
+
+Four visible rows better communicates a starting observation than six.
+
+Input size communicates expected effort.
+
+"What have you noticed?" reinforces observational thinking.
+
+Users are encouraged to begin rather than compose.
+
+The facilitator and workspace now feel more balanced.
+
+This interaction principle should continue throughout the investigation rather than existing only on the landing page.
+
+#### Decision
+
+Retain the smaller landing input.
+
+Proceed to investigate consistency between the landing experience and investigation responses.
+
+---
+
+### Experiment 08 — Consistent Investigation Responses
+
+#### Hypothesis
+
+Every answer given during an investigation should feel like an observation, not a report.
+
+The response component should therefore communicate the same expected effort as the initial scenario input.
+
+#### Questions
+
+- Does a smaller response area reduce perceived effort?
+- Does the investigation feel more conversational?
+- Does consistency improve confidence?
+- Does the workspace become visually calmer?
+- Does the current investigation remain the dominant focus?
+
 #### Status
 
 Experimental.
 
+No conclusions yet.
+
 ---
 
 ## Current Open Questions