Answer:
Accordingly, any knowledge gained of the emotions of others is revisable in the light of further information
Step-by-step explanation:
Concord in grammar is simply the agreement of the subject of a sentence with its verb. In other words, it's known as Subject-Verb agreement.
Therefore, the error in the given sentence is the disagreement of tenses between the subject and verb. The subject is in singular form, but the verb is in plural form.
The correct sentence has been given above.