A few answers on the site that seem to conflict

Shalom Rabbi. I have been finding some contradictions on the site, answers from different years that conflict. Here are four, each with the quotes and links. Which should be followed in each case? 1. On https://kashrut.org/kitniyot-species/#comment-2509 the answer...

Practical rules for utensils – new, used, and public

Rabbi, can you please clarify the practical rules for utensils? When buying a new pot, pan, knife, cup, or appliance, how do I know if it needs tevilah, a berachah, kashering, or nothing? Does the material matter? Also, what are the rules for using utensils from...