Per 
Item #: SCP-XXXX (Mr. Know-It-All)
Object Class: Keter/Thaumiel
Special Containment Procedures: SCP-XXXX is to be locked it its cell at site-██(haven’t decided yet)at all times of the day and to be gagged such to prevent speech and is not allowed to converse in any way with any sentient life, to keep SCP-XXXX from escaping or causing a disruption to anything, the person or persons nearby must be mute, unable to talk, or have enough restraint to never speak with SCP-XXXX
Description: SCP-XXXX is an adult man approximately 1.7 meters tall, though this is subject to change in anyway at any time. SCP-XXXX when arguing with any life possessing sentience, which he seems to enjoy, he no matter what the other person or persons say he will always be correct, this however can be very devastating, as for example if he argued 1+1=3 1+1 for that moment forward, would equal 3, but of course anything he says is true, if he said SCP-682 has been exterminated indefinably, it would happen hence the keter/thaumiel class as he can certainly help the foundation, he is more likely to hurt everyone in the process. See addendum SCP-XXXX-2005-K SCP-XXXX-2006-P and SCP-XXXX-2006-B
Addendum:
The following is an incident report of actions before SCP-XXXX was taken into custody of the foundation.
Incident SCP-XXXX-2005-K, SCP-XXXX during a conversation with a meteorologist in which the meteorologist had stated that there would be a hurricane coming in about three weeks, to which SCP-XXXX had exclaimed ‘to the contrary! Ones happening right now!’ this is when the foundation thinks he realised his powers to their extent and used them for 'fun'
Incident SCP-XXXX-2006-P, SCP-XXXX was talking with a scientist about the planet Pluto and decided it was a dwarf planet.
Incident SCP-XXXX-2006-B, SCP-XXXX during the same conversation came across the topic of honey bees and said they were slowly dying off [Optional additional paragraphs]
This is a small list of known SCP-XXXX events, though there are likely many more unknown
Basically i thought about how there are these really annoying know-it-alls and i though 'Wait what if one was a reaity bender' and here we have Mr. Know-It-All
