Change:
The instructions are really confusing and could be rephrased. ! I don't think what is referred to as a conditional is a what people are going to think of as a conditional. It is just a Boolean expression that is being asked for. No action or assignment is being given depending on truthiness of the expression. It seems like it is looking for an if, switch, ternary or bare conditional, and I believe only ternary or a bare conditional can be placed inside of an array (Not being nested inside of IIFE) which is knowledge a novice probably won't have. The difference, although small, is that a condition takes an action based on the result of a Boolean expression. No conditional action is being taken, so it is just an expression. Might ask for the first element in the array to be a Boolean expression of the sum of the player's position, height and velocity greater than or equal to the platform's position. There are various steps that follow that refer to Boolean expressions as conditionals. The concern is people learning incorrect terminology and getting mixed up in the field.
Yes, you are correct we should update the terminology for steps 78-81 to say boolean expression instead of conditional statement. I have opened this up for contribution.
For each of the steps, make sure to make the change mentioned above in all of the descriptions. Also, go through and check all of the hint text to make sure the correct terminology is used as well
It is bigger than a few steps. I did not track all the steps but kept seeing it through to the end of the course. It happens everywhere that we later do conditional action based on the Booleans stored in arrays. For each array we made, (I think there were 3? player, platform and checkpoints), the instructions use the same wording.
Looks like we have a PR to address the few steps I mentioned earlier. We can review that and merge it in which will close this particular issue. But then I can audit the project to find the other steps and create a second PR to remove the rest
Did a search and replace for the english files and found five more files total where the change needed to be applied. Here is the PR to resolve that.

Discussion:
Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array. <del> Inside that array, add a conditional statement that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position. </del> <ins> Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position. </ins> # --hints--

assert.match(code, /consts+collisionDetectionRuless*=s*[s*(?:[^]]*s*)*];?/); ``` <del> You should have a conditional statement that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position. </del> <ins> You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position. </ins> ```js assert.match(code, /consts+collisionDetectionRuless*=s*[s*player.position.ys++s*player.heights*<=s*platform.position.y,?s*]s*;?/);

# --description-- <del> Add another conditional statement that checks if the sum of the player's `y` position, height, and `y` velocity is greater than or equal to the platform's `y` position. </del> <ins> Add another boolean expression that checks if the sum of the player's `y` position, height, and `y` velocity is greater than or equal to the platform's `y` position. </ins> # --hints-- <del> You should have a conditional statement that checks if the sum of the player's `y` position, height, and `y` velocity is greater than or equal to the platform's `y` position. </del> <ins> You should have a boolean expression that checks if the sum of the player's `y` position, height, and `y` velocity is greater than or equal to the platform's `y` position. </ins> ```js

# --description-- <del> Below that conditional statement, add another conditional statement that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width. </del> <ins> Below that boolean expression, add another boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width. </ins> # --hints-- <del> You should have a conditional statement that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width. </del> <ins> You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width. </ins> ```js assert.match(code, /consts+collisionDetectionRuless*=s*[s*player.position.ys*+s*player.heights*<=s*platform.position.ys*,s*player.position.ys*+s*player.heights*+s*player.velocity.ys*>=s*platform.position.ys*,s*player.position.xs*>=s*platform.position.xs*-s*player.widths*/s*2,?s*]s*;?/);

# --description-- <del> Add one last conditional statement that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position plus the platform's width minus one-third of the player's width. </del> <ins> Add one last boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position plus the platform's width minus one-third of the player's width. </ins> # --hints-- <del> You should have a conditional statement that checks if the player's `x` position is lesser than or equal to the platform's `x` position plus the platform's width minus the player's width divided by `3`. </del> <ins> You should have a boolean expression that checks if the player's `x` position is lesser than or equal to the platform's `x` position plus the platform's width minus the player's width divided by `3`. </ins> ```js assert.match(code, /player.position.xs*<=s*platform.position.xs*+s*platform.widths*-s*player.widths*/s*3,?/)