Are "1" , "3" and "Bech" Addresses (BTC) forward and backward compatible?

Are "1" , "3" and "Bech" Addresses (BTC) forward and backward compatible?

Wondering if lets say someone has funds in Bech32 and they send to a "1" or "3" address due to less characters to remember ect.

http://bit.ly/2BFiQ8x

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