Can humans think?

See also Brand-new colour created by tricking human eyes with laser - News - nature.com.

It’s not just the narrow wavelength. Even with a perfectly monochromatic green light, your green receptors would activate a lot but your receptors for red and blue would still activate a bit. These researchers specifically target only the green receptors to activate (by literally shooting light at those receptors in particular), so for the first time ever your brain reads a pure green signal.

tariff = (export - import) / (<??? factor> × <another ??? factor that cancels the first one out> × import)

The only times anyone would use the asterisk as multiplication symbol are

• they are doing some fancy math and it’s not the same kind of number multiplication we’re familiar with
• they are on a computer, the keyboard does not have a (×) key, and they don’t know how to typeset it (\times in LaTex), so they just use the asterisk instead

The US government falls in the second category.