Compare this boolean expression

  ! (32 < t && t < 212)   // not liquid

with the following one (we moved one of the parentheses).

  ! (32 < t) && t < 212   // ???

The second expression is equivalent to this simpler one.
Draw a number line to see why.

  t <= 32  // frozen


  -------|---------------------------|------- t
        32          liquid          212




Use a number line to analyze this boolean expression.

  (1 <= x && x <= 5) && (x != 2 && x != 3)

  -------|--------|--------|--------------|-------
         1        2        3              5

Here is an equivalent, easier to read, expression.

  (1 <= x && x < 2) || (2 < x && x < 3) || (3 < x && x <= 5)