问人而知，并非过错。

There is nothing wrong with knowledge obtained by asking.

Source: Tatoeba

Sentence Composition

1 问 wèn to ask; to inquire
2 人 rén person; people

classifiers: 個, 位
3 而 ér
  1. and
  2. as well as
  3. and so
  4. but (not)
  5. yet (not)
  6. (indicates causal relation)
  7. (indicates change of state)
  8. (indicates contrast)
=4 知 zhī
  1. to know
  2. to be aware
=4 知 zhì
  1. (obsolete on its own in Standard Chinese) Original form of 智 (zhì, “knowing, wisdom, intelligence”).
  2. Original form of 智 (zhì, “knowing, wisdom, intelligence”).
5 并非 bìngfēi really isn't
6 过错 guòcuò
  1. mistake
  2. fault
  3. responsibility (for a fault)