We really should try this recipe someone told me it was good )is this a ethos ?

No, it's not an ethos

Explanation:

Ethos is defined as an appeal to credibility or character, from the statement above we could expound that the person that gave the appeal might not have tested if the food is really good per say, he/she could just presume it.

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.