Goawaylittle6

Planks

One plank is 16×16×16 pixels (4096 cubic pixels).

Bamboo

If one old bamboo (no leaves) is 3×3×16 pixels (144 cubic pixels),..

...that means one plank should be equal to 28.444 (4096/144) bamboo.

But this is simply not true, as:

4

These two crafting recipes imply that one plank could make just 4 bamboo.

Doors

If one door is 16×3×32 pixels (1536 cubic pixels),..

also where does the door hinge come from

...that means 6 planks should yield 16 (24576/1536) doors.

This is not true:

3

Trapdoors

If one trapdoor is 16×16×3 pixels (768 cubic pixels),..

...that means 6 planks should yield 32 (24576/768) trapdoors.

But that is also not true:

2

Pressure Plates

If one pressure plate is 14×14×1 pixels (196 cubic pixels),..

...that means two planks should yield 41.796 (8192/196) pressure plates.

But that is still not true.

Buttons

And worst of all, if one button is 6×2×4 pixels (48 cubic pixels),..

...that means one plank should yield 85.333 (4096/48) buttons.

But that is clearly not true!

---

In conclusion to this information, planks should be HOLLOW.

But wait,...

...these next ones don't make any sense at all.

Bamboo

If:

2

4

And:

44
4

That means...

8 = 9

Shovels

One shovel is made of one plank/ingot/whatevers.

But a worn out shovel takes multiple of those to repair.

Iron Shovel2

(Don't the sticks degrade too? There's no way to repair them if we're just using cobblestone, iron, gold, or diamonds.)