"Obstacle"
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An Obstacle or Constrain or Need impedes the attainment of a Goal.
Ideas are generally proposed ways of attaining a Goal by eliminating such impediments. Tasks are the activities undertaken to achieve the Goal.
"CnIt" is a classic wikiWord acronym for C(onstraint by) n(eed for, resolved by the) I(dea to undertake these t(asks),
Is there an opposing type?