Where does “counterfactualism” come from?

counterfactualism (English) comes from English counterfactual, from English factual, from English fact, from English factness, from English -ness, from Middle English -nesse, from Old English -nes, from Proto-West Germanic -nassī — Creates collective nouns, which refer to groups...

Ancestry of “counterfactualism”, step by step

counterfactualism traces back through two separate lines of ancestry.

via English counterfactual

StepLanguageWordMeaning
1EnglishcounterfactualContrary to the facts; untrue; Of or in...
2EnglishfactualPertaining to or consisting of objective claims;...
3EnglishfactSomething actual as opposed to invented;...
4EnglishfactnessThe quality of being based on facts; The quality...
5English-nessAppended to adjectives to form nouns meaning "the...
6Middle English-nesseAffixed to adjectives to form abstract nouns...
7Old English-nesUsed to form abstract nouns, usually from...
8Proto-West Germanic-nassīUsed to form abstract nouns, usually from...
9Proto-Germanic-inassuz-ness
10Proto-West Germanic-ness, -th
11Proto-Germanic-į̄-th
12Proto-Indo-European-íh₂
13Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European -h₂Every word from English -nessEvery word from Old English -nes
counterfactualism — Etymology, Origin & Word History | Etymology Explorer