Step 1: Recall the previous claim.
The earlier question argued that the internet is reducing concentration ability. To weaken this, we must show evidence of \emph{improved or unaffected cognitive performance} in spite of internet usage.
Step 2: Evaluate options.
- (A) Nietzsche’s style shift — irrelevant to concentration.
- (B) Timekeeping effect — unrelated to concentration or internet.
- (C) Essay-writing skill unchanged — suggests no decline, but not a strong contradiction.
- (D) Falling asleep while reading — strengthens, not weakens.
- (E) Judges with internet access perform better in complex cases — strong contradiction, showing internet exposure may even enhance critical judgment.
Step 3: Conclude.
Since option (E) demonstrates cognitive enhancement rather than decline, it directly weakens the argument.
\[
\boxed{\text{(E) Internet improves judges’ ability → weakens concentration decline claim.}}
\]