Mathematics could be saved from internal discord and from external pressures by becoming part of the unchallengeable science of logic (Scientific American).
Useful english dictionary. 2012.
chal´lenge|a|ble — chal|lenge «CHAL uhnj», verb, lenged, leng|ing, noun. –v.t. 1. to call to a game or contest; dare: »The champion swimmer challenged anyone in the world to beat him. Our school challenged the neighboring school s team to a match. 2. to call to… … Useful english dictionary
chal|lenge — «CHAL uhnj», verb, lenged, leng|ing, noun. –v.t. 1. to call to a game or contest; dare: »The champion swimmer challenged anyone in the world to beat him. Our school challenged the neighboring school s team to a match. 2. to call to fight: »The… … Useful english dictionary
chal´leng|er — chal|lenge «CHAL uhnj», verb, lenged, leng|ing, noun. –v.t. 1. to call to a game or contest; dare: »The champion swimmer challenged anyone in the world to beat him. Our school challenged the neighboring school s team to a match. 2. to call to… … Useful english dictionary
challenge — chal•lenge [[t]ˈtʃæl ɪndʒ[/t]] n. v. lenged, leng•ing 1) a summons to engage in contest, as of skill or strength 2) something that by its nature or character serves as a serious test: Space exploration offers a challenge to humankind[/ex] 3) a… … From formal English to slang
Challengeable — Chal lenge*a*ble, a. That may be challenged. [1913 Webster] … The Collaborative International Dictionary of English
unchallengeable — un|chal|lenge|a|ble [ʌnˈtʃælındʒəbəl] adj 1.) a belief, idea etc that is unchallengeable is definitely true and cannot be questioned or argued with ▪ unchallengeable evidence 2.) if someone s power or authority is unchallengeable, it cannot be… … Dictionary of contemporary English
unchallengeable — un|chal|lenge|a|ble [ ʌn tʃæləndʒəbl ] adjective impossible to change, defeat, or argue with … Usage of the words and phrases in modern English
unchallengeable — un•chal′lenge•a•ble adj. bly, adv … From formal English to slang
un — un·abridged; un·accountable; un·answered; un·aware; un·balance; un·be; un·believe; un·bending; un·blown; un·bolted; un·bound; un·cal·low; un·certain; un·cial; un·ci·form; un·cle; un·clean·ly; un·co; un·collectible; un·comely; un·common;… … English syllables
able — ab·sorb·able; ac·count·able; ac·tion·able; adapt·able; ad·vance·able; ad·vis·able·ness; al·lege·able; al·ter·able; ami·able·ness; bounce·able; brib·able; bridge·able; buff·able; build·able; burn·able; can·cel·able; change·able; change·able·ness;… … English syllables
