
1) Sight unseen
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https://www.crosswordclues.com/clue/blindly

1) Without a rational basis 2) Without seeing or looking
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https://www.crosswordclues.com/clue/blindly

• (adv.) Without sight, discernment, or understanding; without thought, investigation, knowledge, or purpose of one`s own.
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http://thinkexist.com/dictionary/meaning/blindly/
Blind'ly adverb Without sight, discernment, or understanding; without thought, investigation, knowledge, or purpose of one's own. « By his imperious mistress
blindly led.
Dryden. »
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http://www.encyclo.co.uk/webster/B/66

[
adv] - without seeing or looking 2. [adv] - without preparation or reflection
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http://www.webdictionary.co.uk/definition.php?query=blindly
adverb without seeing or looking; `he felt around his desk blindly`
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https://www.encyclo.co.uk/local/20974

in a blind manner: We felt our way blindly through the black tunnel. · without understanding, reservation, or objection; unthinkingly: They followed their leaders blindly. · without continuation: The passage ended blindly 50 feet away.
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https://www.infoplease.com/dictionary/blindly
No exact match found.