Some of the many species Jeffrey Combs has evolved into:
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Or he knows the ascii representation of the symbol (https://sites.psu.edu/symbolcodes/windows/codealt/, it also works under Linux, the shortcut is crtl+shift+u and requires the unicode representation as a hexadecimal).
Most people use twitter on their phone. I tend to assume everyone on twitter is on a phone. The vertical screenshots give it away.
