conflict - 2025 ACF Winter

Question

An alternative to operational transformations in collaborative software are data types named for being “[this word]-free.” For 10 points each:

[10m] Name this word, which also describes a situation that occurs when attempting to use the “git merge” command on incompatible branches.

ANSWER: conflict [accept merge conflict; accept conflict-free replicated data type; prompt on CRDT]

[10h] Conflict-free replicated data types can be used to implement collaborative text editors with the “strong” form of this two-word property, the requirement that all nodes in a distributed system converge to the same state if no further updates are made.

ANSWER: eventual consistency [or being eventually consistent; accept strong eventual consistency; prompt on consistency or being consistent]

[10e] CRDTs enable collaborative text editors that are “local-first” and avoid using this type of storage. Most collaborative text editors like Google Docs sync to this type of storage, in which data is stored in remote servers accessible via the Internet.

ANSWER: cloud storage [accept cloud computing; prompt on Google Drive by asking “can you be less specific?”]

<Editors, Other Science>

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Summary


California	Main	Y	5	16.00	100%	40%	20%
Canada	Main	Y	5	18.00	100%	60%	20%
Great Lakes	Main	Y	6	11.67	100%	17%	0%
Lower Mid-Atlantic	Main	Y	7	11.43	100%	14%	0%
Midwest	Main	Y	10	12.00	100%	20%	0%
North	Main	Y	10	13.00	100%	30%	0%
Northeast	Main	Y	5	12.00	100%	20%	0%
Pacific Northwest	Main	Y	9	14.44	100%	33%	11%
Pacific Northwest	Main	Y	1	10.00	100%	0%	0%
South Central	Main	Y	5	16.00	100%	60%	0%
Southeast	Main	Y	12	13.33	100%	25%	8%
UK	Main	Y	4	22.50	100%	100%	25%
Upper Mid-Atlantic	Main	Y	8	13.75	88%	50%	0%
Upstate NY	Main	Y	8	11.25	100%	13%	0%
2025 ACF Nationals	2025-08-09	Y	11	12.73	91%	36%	0%
2024 ARCADIA at UC Berkeley	04/19/2025	Y	4	17.50	100%	75%	0%

Data


Berkeley D	Berkeley A	10	0	10	20
Stanford B	UCSC	0	10	10	20
Berkeley C	Berkeley F	0	0	10	10
Stanford A	Berkeley B	10	0	10	20
Claremont Scripps	UCSD Two Running Violet V Forms	10	0	10	20
UCLA A	UCSB	10	0	10	20
UCLA B	UCSD Vices and Virtues	0	0	10	10
UCLA C	UCSD What Hath God Wrought	10	10	10	30
USC	Claremont Pitzer	0	0	10	10
UF E	Melbourne B	10	0	10	20
UF C	ERAU A	0	0	10	10
UF B	ERAU B	0	0	10	10
FIU	Melbourne A	0	0	10	10
UF D	FSU	0	0	10	10
UF A	USF	0	0	10	10
Berkeley E	Stanford C	0	0	10	10
CWRU A	MSU A	0	0	10	10
OSU D	CWRU B	0	0	10	10
CWRU C	Kenyon A	10	0	10	20
CWRU D	Kenyon B	0	0	10	10
OSU B	MSU B	0	0	10	10
OSU A	OSU C	0	0	10	10
Pitt B	Pitt C	0	0	10	10
Tennessee A	Clemson B	0	0	10	10
Liberty A	Tennessee B	0	0	10	10
North Carolina C	Liberty C	10	0	10	20
North Carolina B	James Madison	0	0	10	10
Roanoke	Virginia B	0	0	10	10
South Carolina B	North Carolina A	0	0	10	10
Tusculum	South Carolina A	0	0	10	10
Virginia A	NC State	10	0	10	20
Virginia Tech A	Clemson A	0	0	10	10
Liberty B	Virginia Tech B	0	0	10	10
Georgetown A	George Mason B	0	0	10	10
George Washington A	Johns Hopkins C	0	0	10	10
George Mason C	Maryland A	0	0	10	10
Maryland B	Penn A	10	0	10	20
Catholic University	NYU A	0	0	10	10
NYU B	George Washington B	10	0	10	20
Notre Dame E	Johns Hopkins A	0	0	10	10
Maryland D	Penn B	0	0	10	10
VCU A	UMBC A	10	0	10	20
Columbia A	Princeton A	0	0	10	10
Swarthmore A	Columbia C	0	0	10	10
Vassar A	Lehigh A	0	0	10	10
Lehigh B	Rowan A	0	0	10	10
Rutgers B	Columbia B	10	0	10	20
Chicago D	Michigan A	10	10	10	30
Indiana A	Purdue C	10	0	10	20
Illinois A	Indiana B	0	0	10	10
Louisville B	Michigan B	0	0	10	10
Chicago A	Michigan D	0	0	10	10
Notre Dame B	UIC	0	0	10	10
Kentucky	Notre Dame D	0	0	10	10
Illinois B	Purdue A	10	0	10	20
Notre Dame A	Purdue B	0	0	10	10
Notre Dame C	Chicago C	0	0	10	10
Georgetown B	Maryland C	0	0	10	10
Minnesota C	Carleton	0	0	10	10
Minnesota A	Macalester A	10	0	10	20
Iowa State	Macalester B	10	0	10	20
Nebraska	St. Thomas	0	0	10	10
Brown A	BC A	0	0	10	10
BC B	Brandeis Lloyd George	0	0	10	10
BU	Brandeis Orlando	0	0	10	10
Bowdoin B	Cornell-UG	0	0	10	10
Yale A	Brandeis Clemenceau	0	0	10	10
Brown C	Amherst A	10	0	10	20
MIT A	Brown B	10	10	10	30
Dartmouth	MIT B	0	0	10	10
Tufts A	Amherst B	10	0	10	20
Brandeis Wilson	Tufts B	0	0	10	10
Williams	Bowdoin A	0	0	10	10
Harvard	Yale B	0	0	10	10
Washington B	British Columbia A	10	10	10	30
British Columbia D	Washington A	10	0	10	20
Simon Fraser	British Columbia C	10	0	10	20
British Columbia B	Alberta	10	0	10	20
Northwestern A	Arizona State B	0	0	10	10
Ohio	Tulsa	10	0	0	10
Iowa	Rose State	0	0	10	10
Texas A	McGill D	10	0	10	20
Texas B	Northwestern C	0	0	10	10
UCO	UTD B	0	0	10	10
UTD A	Alberta B	10	0	10	20
Arizona State A	Northwestern B	10	0	10	20
Minnesota B	Wisconsin	10	0	10	20
Georgia Tech A	Alabama A	0	0	10	10
Georgia Tech C	Alabama B	0	0	10	10
Vanderbilt B	Georgia Tech D	0	0	10	10
Huntsville A	Vanderbilt A	0	0	10	10
Bruin A	Huntsville B	0	0	10	10
Mississippi State A	Sewanee A	0	0	10	10
Auburn B	UAB A	0	0	10	10
Sheffield B	Birmingham A	0	0	10	10
Cambridge B	Imperial A	10	0	10	20
LSE A	Cambridge C	0	0	10	10
Durham B	Sheffield C	0	0	10	10
Warwick B	Edinburgh B	10	0	10	20
Edinburgh A	Imperial B	0	0	0	0
LSE B	Bristol A	0	0	10	10
Lancaster A	Bristol B	0	0	10	10
Southampton A	Manchester A	10	0	10	20
Cambridge A	Manchester B	10	0	10	20
Oxford A	Imperial C	0	0	10	10
ESF	Cornell-DII	0	0	10	10
Rochester	RIT A	10	0	10	20
RIT B	Binghamton B	10	0	10	20
Binghamton A	Syracuse	10	0	10	20
Georgia Tech B	Auburn A	10	0	10	20