Contradiction with Matthew 7:1
"Judge not, that ye be not judged." Contradicts Titus 2:1's call for speaking sound doctrine which requires judgment of what is sound.
Matthew 7:1: Judge not, that ye be not judged.
Contradiction with 1 Corinthians 4:5
"Therefore judge nothing before the time, until the Lord come..." Suggests not to judge, conflicting with the need for discernment in Titus 2:1.
1 Corinthians 4:5: Therefore judge nothing before the time, until the Lord come, who both will bring to light the hidden things of darkness, and will make manifest the counsels of the hearts: and then shall every man have praise of God.
Contradiction with James 4:11
"Speak not evil one of another, brethren." Could oppose the criticism implied in correcting unsound doctrine as required by Titus 2:1.
James 4:11: Speak not evil one of another, brethren. He that speaketh evil of [his] brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge.
Contradiction with 1 Corinthians 8:1
"Knowledge puffeth up, but charity edifieth." Potentially contradicts the emphasis on doctrine over love seen in Titus 2:1.
1 Corinthians 8:1: Now as touching things offered unto idols, we know that we all have knowledge. Knowledge puffeth up, but charity edifieth.
Contradiction with Romans 14:1
"Him that is weak in the faith receive ye, but not to doubtful disputations." Suggests acceptance over correction that Titus 2:1 implies.
Romans 14:1: Him that is weak in the faith receive ye, [but] not to doubtful disputations. [not...: or, not to judge his doubtful thoughts]