How to tell if a Minecraft answer is valid for the tagged version of Minecraft?

Question

I saw this answer to a Minecraft Java edition question:

You can use testForBlock command to search where the command block is placed (well, this command was then removed in Minecraft Java 1.13).

The syntax of the above commands:

/testForBlock <position: x y z> <tileName: Block> [dataValue: int] 

Or you could use gamerule command to disable command blocks in the map completely.

Command:

/gamerule commandBlocksEnabled false

To which the question asker replied with a comment saying:

I don't know where the command block is and I don't play on bedrock

As a person who has only primarily played vanilla Minecraft Java Edition, (well I played a good amount of Minecraft when it was on Xbox 360/One before it was replaced with Bedrock edition), and as a player who seldom used commands in any fashion, I for one cannot tell how the answer quoted above is specific to the Bedrock Edition of the game (as the comment from the OPer would suggest).

I've seen this happen a good amount - someone posts an answer valid to X version of the game when the question was about Y version and the answer isn't valid (i.e. a user asks a question about Java edition, but someone gives an answer that would only work in Bedrock). This often clouds my ability to be able to improve posts, recommend/vote on deletions, etc. if I can't tell if the post in question is valid for the edition of Minecraft.

What are some give aways that could denote if an answer to a Minecraft question is specific to that version of the game? Some things I thought of that could be give aways:

• Certain commands only found in certain versions of the game (as someone else commented later).
• Certain features only available in certain versions of the game.
• Certain content only available in certain versions of the game.

But what commands/features/content are specific to which versions?

Answer 1

First of all, go visit the wiki page to see which commands are exclusive to which versions.

Terminology used:

• NBT data: NBT stands for Named Binary Tag, and it is used by Minecraft for the various files in which it saves data. The format is designed to store data in a tree structure made up of various tags.
  The syntax of NBT is similar to that of JSON, however keys are not enclosed in quotation marks.

Here are some other giveaways:

Giveaways that an answer is for MCJE:

• The command includes NBT data and/or block states directly next to the entity/block ID.

  give @p diamond_sword{Test:1b}
  setblock ~ ~ ~ chest{Items:[...]}
  

• The command uses MCJE 1.13+ /execute syntax.

  execute as @a at @s run setblock ~ ~-1 ~ air
  

• The raw JSON text does not have rawtext:

  tellraw @p {"text":"hi."}
  

Giveaways that an answer is for MCBE, or MCJE 1.12−:

• MCJE 1.13+ updated the location of NBT data within block and item IDs in commands, as you can see in the first bullet point in the above list. If the command includes JSON item data^MCBE or NBT data^{MCJE 1.12−}, at the end of the command, with two numbers in between, it's MCJE 1.12− or MCBE, depending on which is used:

  give @p dirt 1 0 {CanPlaceOn:["minecraft:stone"]}
  give @p dirt 1 0 {"minecraft:can_place_on":{"blocks":["stone"]}}
  

• The command uses old /execute syntax.

  execute @a ~ ~ ~ setblock ~ ~-1 ~ air
  

• The raw JSON text does have rawtext:

  tellraw @p {"rawtext":[{"text":"hi."}]}
  

I will update this answer with additional items.