Take a look at Watchtowers reasoning in the first video from 46 minutes to 56 minutes regarding the 2 witness rule. The scripture the Watchtower representative refers to is perfectly fine in relation to situations within context.
But how can the 2 witness rule be applied to a sexual assault or child abuse allegation when only the victim and the perpetrator were present when the crime took place? How can the 2 witness rule be applied if the perpetrator denies the allegation?.
Angus Stewart from the Australian Royal commission also puts across his point in the 2nd video about reasoning things out.
See if you can spot the difference
'If you reason something out; you will be influenced to make the proper decision'