For all the logic nodes I'm making, I'm using these symbols. These are not the ones you'd usually see, but I needed something every browser could handle.

~ = Not (this is pretty standard)

* = And (usually just a bullet point)

^ = Or (usually a small 'V')

= = The same as (standard)

> = Implication (If,Then, --usually a sideways 'U')

# = If and Only If (usually three horizontal lines stacked vertically)

P,Q = Statements (standard)

// = The conclusion of an argument (standard)

More formally, you might see the following. HTML symbol names are in parentheses.

¬ NOT   (¬)

∨ OR   (∨)

∧ AND   (∧)

≡ equivalent   (≡)

→ implies   (→)

↔ if and only if   (↔)

| NAND

↓ NOR   (↓)

⊥ falsum, 0   (⊥)