The phrase "more evidencing" can be replaced with synonyms such as "further substantiating," "additional proofing," or "bolstering the evidence." These alternatives convey the idea of providing additional evidence to support a claim or argument. Other synonyms for "more evidencing" include "strengthening the case," "providing corroborating evidence," or "backing up the assertion." Using varied synonyms in writing can help to avoid repetition, add nuance, and make the text more engaging for the reader. Overall, there are multiple synonyms available to convey the idea of adding more evidence to prove or support an argument.