Beers that have undergone a secondary fermentation with live yeast in the bottle will be naturally

I think the correct term to fill in the blank would be clarify. Secondary fermentation is done to alcoholic beverages mainly to clarify the drink further by settling the particles that were not filtered out during the first process. Another thing, it would further ferment the drink however this is a smaller fraction of the main purpose.

It would be a rusting car, for sure 

Essential for a scientist to do for credibility

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.