[Slash Commands] How to OR/AND PermissionFlagsBits in defaultMemberPermissions?

[Zer0xxxx]

Hello!
I'm implementing slash commands, and I would like to know how to build AND/OR PermissionFlagsBits conjunctions.

I think that doing this:

return Array.from(permissions.defaultMemberPermissions.AND).reduce(
      (mergedBitFlags, currentBitFlagKey) => mergedBitFlags | PermissionFlagsBits[currentBitFlagKey],
      0n
    );

Produces a AND conjunction of all the PermissionFlagsBits.
This is strange because I use the | binary operator, which means "OR"?

So, maybe I have achieved the AND conjunction, idk.
But I don't know how to achieve the OR conjunction.

Also, I don't know how to produce the good packed binary value for designing something like this:

defaultMemberPermissions: {
  OR: new Set(['MuteMembers', 'ModerateMembers', 'KickMembers', 'BanMembers']),
  AND: new Set(['AttachFiles', 'ManageGuild'])
},

Which would mean:

The member...
Must have both the AttachFiles and ManageGuild permissions,
AND at least MuteMembers OR ModerateMembers OR KickMembers OR BanMembers permission

Btw: this example is a bit meaningless.
What I'd like above all is to be able to understand the arithmetic behind it.

So that I can generalize it to any constructor where the AND and OR bitflags must not overlap (flags in the OR clause will be forbidden to be duplicated in the AND clause, and vice versa).

Thank you a lot for all kinds of help!

Also, I read the documentation here, and only see how to build AND conjunctions
https://discord.com/developers/docs/topics/permissions