Difference between Optimistic and Pollyannaish

OPTIMISTIC vs POLLYANNAISH: ADJECTIVE

Expecting the best in all possible ways.
Hopeful; sanguine.
Of or pertaining to optimism; tending, or conforming, to the opinion that all events are ordered for the best.
Expecting the best
Expecting the best in this best of all possible worlds

Of, pertaining to, or characterized by optimism; disposed to take the most hopeful view of a matter; hopeful; sanguine.

Satisfied, Convinced, Confident, Hopeful, Pessimistic, Starry eyed, Rose colored, Affirmative, Cheerful, Pollyannaish, Positive, Rosy, Bullish, Upbeat, Sanguine

Shortsighted, Unrealistic, Disingenuous, Delusional, Simpleminded, Cynical, Pessimistic, Simplistic, Defeatist, Wishful, Panglossian, Naive, Cheerful, Upbeat, Optimistic

Satisfied, Convinced, Confident, Hopeful, Pessimistic, Starry eyed, Rose colored, Affirmative, Cheerful, Pollyannaish, Positive, Rosy, Bullish, Upbeat, Sanguine

Shortsighted, Unrealistic, Disingenuous, Delusional, Simpleminded, Cynical, Pessimistic, Simplistic, Defeatist, Wishful, Panglossian, Naive, Cheerful, Upbeat, Optimistic

Pandemic experts are starting to sound increasingly optimistic.
Correcting for optimistic prediction in small data sets.
Still, ultimately he is guardedly optimistic about mechanism.
Studies conducted in humans show less optimistic findings.
This is an optimistic skyline of New York.
These results are related to the hypothesis of optimistic bias, which states that drinkers are overly optimistic about probabilities of adverse consequences from drink.
In an optimistic locking session, you must take responsibility for coherence and consistence by following an optimistic locking protocol.
SD, through the slightly optimistic last observation carried forward method, to the optimistic complete case analysis.
Are you more optimistic or less optimistic than you were a month ago?
That was idealistic and optimistic, a way too optimistic hope.

The type of leadership called for here is not of this sort: it is pragmatic, not Pollyannaish; it is earned, not imparted.
An attendee said the tone of the briefing, which the campaign said was scheduled over the summer, was boosterish but not Pollyannaish.
Pollyannaish world view in which positive expectancies for the future are the sole determinant of future outcomes.
This concern was dismissed by most Republicans as moral preening or a Pollyannaish unwillingness to recognize the distinction between private morality and realpolitik.
As Chaulia notes in his introductory chapter, the book "transcends Pollyannaish delusions about aid agencies".
Pollyannaish attitude that, for them, deeply missed the point.
Pollyannaish appraisal of the threats facing America today.