Very strange issue based on "Nil"?

To begin, I've got a script that will detect if hit or hit.Parent is Nil when a block is touched. It reads off whether hit or hit.Parent is nil in the output at the start of the script, and is supposed to cancel going any farther if either is Nil since it will cause errors later on. However, it isn't working correctly, and will tell me something isn't Nil, then give me an error when I touch the block with it (stating that it's canceling because of a Nilvalue)

This is NOT a LocalScript. Here's the script thus far:

local debounce = false
local splinter = game.Lighting.Splinters

script.Parent.door.check.Touched:connect(function(hit)
    print("It is "..(tostring(hit == nil)).." that "..(tostring(hit)).." is nil!")
    print("It is "..(tostring(hit.Parent == nil)).." that "..(tostring(hit)).."'s parent is nil!")
    if (hit.Parent == nil) or (hit == nil) then print("Oooh, big scery ghoost.") return
        else
    if debounce == false then
    local walkspede = game.Players:GetPlayerFromCharacter(hit.Parent).Character.Humanoid.WalkSpeed
if walkspede == 24 then
    debounce = true
    script.Parent.DoorKnob1.Anchored = false
    script.Parent.door:Destroy()
    for i = 1, 16 do
        splinter.Splinter1:Clone().Parent = script.Parent.burstpoint
        print("Clone1") -- I should probably remove these... oh well.
        splinter.Splinter2:Clone().Parent = script.Parent.burstpoint
        print("Clone2")
        splinter.Splinter3:Clone().Parent = script.Parent.burstpoint
        print("Clone3")
        splinter.Splinter4:Clone().Parent = script.Parent.burstpoint
        print("Clone4")
    end 
    game.Players:GetPlayerFromCharacter(hit.Parent).Character.Humanoid.PlatformStand = true
    wait(1)
    game.Players:GetPlayerFromCharacter(hit.Parent).Character.Humanoid.PlatformStand = false
    wait(1)
    debounce = false
else 
    debounce = true 
    print ((tostring(hit.Parent))..", walk fastr scrub!1!!1") -- Prints like this are what keep me entertained whilst coding...
    wait(1)
    debounce = false

end
end
end
end)

Whenever I touch the block mentioned above with another block called "DoorKnob1", it gives me these lines in the output:

• It is false that DoorKnob1 is nil!
• It is false that DoorKnob1's parent is nil!
• 22:55:05.795 - Workspace.SplinterDoor.Script:11: attempt to index a nil value
• 22:55:05.795 - Stack Begin
• 22:55:05.796 - Script 'Workspace.SplinterDoor.Script', Line 11
• 22:55:05.796 - Stack End

If somebody could explain to me why it's contradicting itself (at least, seems to be) and how to resolve the error, I'd be very grateful.

Thank you for reading, and hopefully you won't be as confused as I am!