Therefore sign specialized keyboards and fonts, and to prevent compatibility issues, it's often substituted by a colon followed by a period (":.") even if it's considered more elegant to use the original therefore character in printing. Therefore sign In logical argument and mathematical proof, the therefore sign (∴) is generally used before a logical consequence, such as the conclusion of a syllogism. The symbol consists of three dots placed in an upright triangle and is read "therefore". It is encoded at . For common use in Microsoft Office hold the ALT key and type "8756". While it is not generally used in
Laundry symbol in the triangle prohibit chlorine bleaching. A crossed triangle prohibits any bleaching. A "circle in the square" symbolizes a clothes dryer. One dot requires drying at reduced temperature and two dots for normal temperature. The crossed symbol means that the clothing does not tolerate machine drying. In the U.S. and Japan, there are other icons for natural drying. The "iron" with up to three dots allows for ironing. The number of dots are assigned temperatures: one prescribes 110°C, two for 150°C and three for 200°C. An iron with a cross prohibits ironing. A "circle" identifies the possibilities of professional cleaning.