R0045/2026-03-29/Q002 — ACH Matrix¶
Matrix¶
| H1: Apache dominant (63% hostnames) | H2: Not dominant in enterprise | H3: Measurement-dependent | |
|---|---|---|---|
| SRC01-E01: Apache 63.02% hostnames June 2001 | ++ | -- | ++ |
| SRC01-E02: Apache 62.42% active sites | ++ | - | + |
| SRC02-E01: Apache ~2/3 of web by Nov 2003 | ++ | -- | + |
| SRC03-E01: Windows 49.2% physical servers | -- | ++ | ++ |
Legend:
- ++ Strongly supports
- + Supports
- -- Strongly contradicts
- - Contradicts
- N/A Not applicable to this hypothesis
Diagnosticity Analysis¶
Most Diagnostic Evidence¶
| Evidence ID | Why Diagnostic |
|---|---|
| SRC03-E01 | The physical server count data is the most diagnostic because it directly discriminates between H1 (overall dominance) and H3 (measurement-dependent) — Apache's 63% hostname share does not translate to physical server dominance |
Least Diagnostic Evidence¶
| Evidence ID | Why Non-Diagnostic |
|---|---|
| SRC02-E01 | The 2003 data shows Apache's continued hostname dominance but uses the same methodology, so it does not help discriminate between the hostname vs physical server perspectives |
Outcome¶
Hypothesis supported: H3 — The evidence shows that Apache's dominance was real by hostname count but not by physical server count. The question of "dominant" cannot be answered without specifying the metric.
Hypotheses eliminated: None fully eliminated — H1 is correct by hostname count, H2 is correct by physical server count.
Hypotheses inconclusive: H1 and H2 are both partially correct depending on measurement methodology, which is precisely what H3 captures.