demonstrable

英 [dɪ'mɒnstrəb(ə)l; 'demən-] 美[dɪ'mɑnstrəbl]

• adj. 可论证的；显而易见的

1. necessarily or demonstrably true;

"demonstrable truths"

2. capable of being demonstrated or proved;

"obvious lies"

"a demonstrable lack of concern for the general welfare"

"practical truth provable to all men"- Walter Bagehot